Of course, you don't have to lose your computer to lose your computer. A disk crash or similar accident can wipe out all your data, a whole trip's worth of work. And then there are those all-too-human errors where you know you saved the file, but you don't know where. Data backup may be most important when it's least available, when you're on the road and on the run.

But if you've got Web access, you've got backup. It can be really simple, like e-mailing yourself the documents you create -- especially good if you use a Web-based mail service such as Google Inc.'s Gmail. If you work with bigger files or want a more all-encompassing backup, try one of the Web-based backup services. MozyHome

EMC Corp.'s MozyHome service gets high marks for its features and interface, and better still, you can create a personal account that gives you 2GB of free backup space -- plenty to safeguard what you do while you're traveling.

The company is obviously hoping you'll like the service enough to sign up for its $4.95-per-month unlimited plan, which really does offer unlimited storage space but not (a word to the wise) unlimited bandwidth -- a full backup of a large laptop drive can take days.

Like most backup applications, Mozy requires a learning curve, so give yourself time to install the MozyHome application and figure out the "expert wizard" and the difference between Mozy's "backup sets" and the file-and-folders structure you're used to working with on your hard drive. There is a manual (download PDF), though it's sort of a well-kept secret. MozyHome works with Windows 2000, XP and Vista as well as Mac OS X 10.4 and later.

Go For It

There you have it: eight great tools for keeping you charged, connected, boosted and protected. Choose the ones that will help you the most, and you're good to go, road warrior.

What's in your travel kit? Share your road warrior gear essentials.

Freelance writer David DeJean began writing about computers after Cobol but before C++. He has worked for newspapers, magazines, trade publications and Web sites.