water is a good suggestion, so is NAUTRAL sugar, i.e: fruit juice (I like cranberry, most people like orange)
I'd also suggest getting a B-multi in you (B6/B12 multi, at least 500mg), will do more than caffiene
and if you must have caffiene, do not hit energy drinks, go for coffee, doesn't matter how strong it is, the natural caffiene is what you want, not the artifical caffiene
once you get past the first ~25-30 hours its smooth sailing, usually around hour 48-50 you'll start feeling weird (after you eat breakfast #2, for sunrise #2, your head gets a bit wonky coping with that), and the crash will probably hit around hour 70-75 (around breakfast #3 for sunrise #3, by that time, don't be surprised if you're slurring your speech, and feel jittery when you lay down)
things to avoid doing at all costs:
any long exposure driving, highway hypnosis is very real, especially when tired, and its very scary
any long exposure physical activity, for example running a marathon or working a 10 hour shift in a kitchen, if you've been up for 12-16 hours already, expect a blackout
some other notes:
music doesn't really have an impact, you can listen to all the thrash metal @ deafening volumes you want on your Grado's or whatever other scenario you've got planned out, it just hurts like hell and gives you a headache
basically keep to a normal daily routine, and you'll be fine (don't get caught up thinking about the exhaustion, keep yourself going), I went through three days of insomnia in undergrad (no explanation, I just didn't want to sleep, was awake for around 68 hours with 4 hours of sleep previous to that, and only slept like 7 hours at the end of it, probably the most productive three days of my life so far), the easiest way to "survive" is getting into a rhythm with it, you just ignore that everyone else is tucking themselves in and sleeping, and keep about your business