PM Computers

Always keep a spare

If you plan to leave the country and need to take a computer with you, buy a brand new one, and keep the files you need to work with, on a jump drive/key drive/thumb drive. Thumb Drives can be kept away from the computer and may not be searched if they are kept with your tooth paste or clothes.

http://arstechnica.com/news.ars/post/20080423-laptop-searches-at-the-border-no-reason-no-problem.html

Another good tip is to run Linux and configure it to boot to a shell before flying home. Chances are most customs agents are only familiar with Microsoft operating systems. If all the see upon booting up is a text based login prompt they are likely to let you go.

Also be sure to check the licensing terms of any programs you need to use. Most software packages allow for three installations by a home user. This will save some money when setting up a business only travel laptop.