The Best Travel Gadgets of 2009

The worst parts of jet lag can be uneven sleep and the resulting morning grogginess. The Sleeptracker, which we included on our Inventions of the Year list in 2005, is like a traveling sleep fairy — it monitors your sleep cycles and adjusts its alarm clock to ensure, first, that it's not interrupting quality REM and, second, that you're awakened when your sleep cycle says it's time. So what's new this year? The Sleeptracker Elite models include software that allows you to view and analyze your sleeping patterns. It will do more than give you something to talk about at cocktail parties; the insights it provides may lead you to better sleep.

Sleeptracker Elite for Him or Her: $179