As someone who travels a lot, I know the feeling of boredom for not being able to do anything during a trip (except take a nap). With that in mind, I bring gaming stuff like a Nintendo gameboy when I was younger and now my PSP.

How about you guys? Any stuff you bring along to pass the time? I'm thinking of buying a Nintendo DS just for some games I know I'll love to play while on a trip (Phoenix Wright?).