Also check whether you have a power source that will be compatible with the electric current in your country, and if not, what kind of converter you need. If you are planning to use a modem overseas, you may need to get a telephone adapter plug for your phone cord. Power surges are fairly common in some countries, so pick up a surge suppressor once you are abroad. American ones are made for 110 current and don't work with 220 or 240 current. Small lightweight single units are available that can handle a notebook computer and a modem line.
Computer locks can bring peace of mind on archive lunch breaks.
Backups are essential to protect your hard-earned data. Make copies often, keep some separately from your computer, and you might take extra disks and disk mailers with you to mail home periodically from the road. Winzip is one of the programs that will easily compress your data so it fits on one disk. For extra security, e-mail your most important zipped files to a friend or two and ask them to store them until you get home. There are also storage sites on the internet where you can upload your files.