Though I haven't taken the GMAT yet, from what I've read from several debriefs of people who scored 700+, I think it's vital that you get at least 6 hours of sleep, at least in the week leading up to the GMAT. I'd probably go ahead and say, sleep 8 hours. Ultimately, it's important that you are well rested and can think straight.
I would say if you're not a coffee person don't drink coffee just to keep you awake. Try apple juice instead. It's pretty potent (!!!). Like in my case, coffee doesn't keep me awake, it puts me to sleep (Anomaly, yeah), so I drink coffee purely because i love the taste of it.
Just eat a balanced diet and don't rely on artificial substances just to boost your chances of studying. I think choosing a study schedule around your regular sleep-wake pattern would be better than altering your sleep pattern for a prolonged time to go with study schedule, but that's just me.
Yangstr wrote:
Quote:
most of my studying occurred during lunch breaks, from midnight to 2am on weekdays and during the weekends (assuming I wasn’t working)
How many hours do you need for your night sleep? What nutrition/chemistry do you use to perform well when you sleep less than 6-7 hours a day?
It is my personal problem - the only time I can devote to GMAT is night and several hours at the weekends, and my brain doesn't function efficiently when I don't get my 6+ hours of healthy sleep.