I hate trips AND vacations, but usually a phone or, if I happen to have one at the time, a mobile gaming device. I remember only two (out of two) occasions where this is relevant: First being at some god-awful Yogi Bear camp when I was like, 12 or 13? I brought my DS with me, only having a couple Pokemon games. Another was a simple cottage near a beach (it was more tolerable because there were lots of arcades near it), in which I had brought my PSP along with me. If I recall correctly, it only had MegaMan 3 and a demo of Peace Walker.
I have neither system now.
Do you have a favorite instrumental song?