Semi-serious answer: Wait for a couple of years until the improvements in flash drive technology discovered by U of Arizona kick in and we all have flash drives with 900 GB of space on them. Shit tons of memory in a small package
Serious answer: Everyone else had mentioned this but I thought I might add my 2 cents to the "Don't get a 7200 RPM drive because it'll become hot easily and drain your battery" fund. Friend of a friend of mine installed one in his laptop and the fan was spinning much faster than before and the temperature was definitely much higher. He was plugged in, so I'm not sure about his say on the battery consumption but I think that was the least of his problems at the time.
Serious answer: Everyone else had mentioned this but I thought I might add my 2 cents to the "Don't get a 7200 RPM drive because it'll become hot easily and drain your battery" fund. Friend of a friend of mine installed one in his laptop and the fan was spinning much faster than before and the temperature was definitely much higher. He was plugged in, so I'm not sure about his say on the battery consumption but I think that was the least of his problems at the time.