Mexico and Central America

Our bags have been stolen twice from inside locked rental cars. Now we travel with a bicycle cable and lock. If we absolutely have to leave our suitcases in the car, I hook them together by the handles and attach the whole thing to the frame of a seat or a secure item in the trunk. Even if thieves manage to get into our car, the cable will make it very difficult for them to make off with the luggage.

Pack a power strip and extension cord for your next cruise. Many cruise-ship cabins have only one out- let, but you'll definitely need more if you want to power up your laptop, iPod, cell phone, electric razor, hairdryer, or any other gadgets you bring on board.

On a trip to Molokai, the plane we were on was small, and luggage was crammed in every which way. At baggage claim, we noticed that someone had packed a bottle of Pine-Sol, and it had broken and leaked everywhere. Now we line our suitcases with garbage bags to protect our clothes—just in case. (It's also smart in case your bag gets left on the tarmac in a downpour.)

We were told by an airport security official to tape a business card onto the cover of our laptop. Turns out he has an average of six laptop computers left behind each day! There are so many more procedures now--removing shoes, removing coats--that people forget when they send their laptop through in a separate bin. The official added that it's very difficult to return them because most laptops have passwords that keep the owners' personal information hidden.

Give your children a coach's whistle in case they get lost; put it on a ribbon so they can wear it around their neck. The piercing sound may be annoying, but you'll definitely find them quicker!

Using restaurant.com, you can buy gift certificates good at eateries in your destination city, regularly snagging (in my experience) $25 certificates for as little as $5 to $8.The site is awesome, and it works as well for restaurant certificates in your own city and for obtaining gifts for friends.

Before traveling overseas, look at your health insurance card. If it only shows an 800 or 888 number for precertification of hospital admissions, call that number and obtain the local number with an area code. Many 800 numbers can't be dialed from foreign countries. I learned this the hard way during an emergency hospital admission in Switzerland. The delay in reaching my carrier could have been avoided.

Don't assume you can save a spot at the pool with your towel. Cruise lines give you one pool towel at the start of the cruise. If you don't have it (or a cleaned trade-in) at the end, you'll get charged. If you let it out of your sight, you run the risk of losing it or having it stolen by a fellow cruiser.

Place a coin over the veins on the inside of your wrist (about two finger widths from the base of your palm) and secure it in place with a rubber band or ponytail holder. The gentle pressure of the coin will stimulate nerves that control nausea, just like the motion-sickness bands that are sold at drugstores.

Many tourist information offices provide discounted same-day booking services for local lodgings. My husband and I discovered this when we accidentally left a midweek gap in our travel plans between my husband's conference hotel and our B&B in Charleston. Instead of adding another night at either location, we stayed at one of the more elegant inns (normally over $200) for $70, courtesy of the Charleston Convention and Visitors Bureau.

Attach a few carabiners--the kind of clips rock climbers use--to the top of your wheeled suitcase. Purses, cameras, and shopping bags can be clipped to your suitcase, giving your hands and shoulders a rest while you're walking around the airport.

Ever since my children were small, I've carried recent, wallet-size pictures of them when we all go on vacation, in case we get separated. Now that they are teenagers and traveling with friends' families, too, I send pictures for the other family to bring along with them. I also write my telephone numbers on the back of the pictures so they know where to reach me in an emergency.

A beach ball can replace many expensive in-flight gadgets. Depending on how much you inflate it, the ball can function as a very comfortable footrest, a back support, or a lap pillow to support your book.

For overnight flights, pack a few Oral B Brush-Ups in your carry-on. Before the plane lands, you can "brush" your teeth, leaving you refreshed and ready for the day!

If you start to feel a painful blister coming on, put some lip balm or Vaseline on the hot spot--it'll help stop the rubbing.

Whenever I'm in a country where drinking or brushing my teeth with the tap water is a risk, I cover the faucet handles in my hotel bathroom with a towel. As a result, I never accidentally turn on the faucet when I'm half asleep.

Using your frequent-flier miles, you might be able to visit two cities on one ticket. For example, my wife and I always trade in our Delta miles when we visit our daughters in Dallas and San Francisco. Because we have to fly through Dallas to get to San Francisco on Delta, we can stop over in Dallas for as long as we want before continuing on to San Francisco—and we use only one frequent-flier ticket each.

It's unnecessary to make a packing list for each trip. Instead, draw up a master list with everything you might need on any given trip--from ski goggles to snorkels, slippers to saline solution. Save it on your computer. Before you start packing, cross out anything you don't need for that particular trip.

If you plan to buy crafts in a country where bargaining is expected, use the time it takes for luggage to be unloaded to scope out the airport stores. Jot down items you like and their retail prices. If you find a similar item while touring the country, you have a top-end bargaining point. If you don't find the object at a better price, you can always pick it up at the airport while you're waiting for your flight home.

At a theme park, tie a brightly colored scarf to the handle of your stroller before you enter a ride. When you return, you'll be able to quickly pick out your stroller from a sea of look-alikes.

I've created files--some general (Southeast Asia), some specific (Hawaii)--for articles and clippings about places I'd like to visit in the future. I don't want all the good tips, restaurant recommendations, and out-of-the-ordinary itineraries to go to waste just because I'm not planning an immediate trip. The files don't have to be super organized--just throw in the clippings, and you can weed through them later. You'll be glad you have the information when you do get a chance to go away.

When you go to a convention or trade show, don't assume that the official prices at recommended hotels are the best you can do. Go to the hotel Web site. I recently got an AARP rate at a major hotel that was 30 percent below the special price offered through the tradeshow sponsors. AAA discounts often work, too.

If you're planning to use an ATM abroad, make sure the money you need is in your checking account, because some foreign ATMs don't allow access to savings accounts. And remember to carry your bank's local phone number with you; 800 numbers generally don't work overseas.

Try getting a discount on your hotel room by offering to pay in cash. A hotel reservationist suggested this approach when I phoned to reserve at a hotel in London. I asked if the hotel could grant a discount based on my AARP or AAA membership, as many hotels do in the United States. Her response was that the only discount she was able to offer was 10 percent if I paid in cash.

Sending a flat-rate Priority Mail box costs $8.10, no matter how much it weighs or which state it's going to. After accumulating too much stuff to fit in my suitcase during a trip to Atlanta, I filled a box with laundry, souvenirs, and gifts for my grandchildren, and mailed it to my home address.

I don't go anywhere without individual packets of antibacterial wipes. I slip some in my carry-on, daypack, and shirt pocket. They're very convenient when you can't find any running water with which to wash your hands. And because they're antibacterial, they're also great for cleaning cuts, and the alcohol from the wipes helps stop the itching when you rub them on insect bites.

Spring skiing often means a wild temperature shift from morning to afternoon. If you want the option of removing outer layers or switching to a lighter ski jacket midday, attach the lift ticket to your clothing with a split-ring key ring. You'll be able to move your ticket as the weather warms up.

Batteries for cameras, laptops, cell phones, and other devices can be charged at night in your hotel room. But if you're doing a lot of driving, you might want to buy an inverter to charge them while on the road. Inverters (which plug into the car's cigarette lighter) are small, inexpensive, and can be purchased at auto-supply, variety, or electronics stores.

A small compass is a great travel aid. Aside from the obvious benefits during country drives or hikes, it's extremely helpful in navigating winding city streets and orienting yourself once you exit a subway station.

Shout Wipes take up very little space in your purse or backpack and are invaluable for treating stains. While traveling on an airplane, I gave one to a most grateful Italian after he spilled wine on his tie. Our friendship extended through customs, and we're now e-mail pals. Great stuff!