The method that i use is to hold a pen over my table at all times when not writing, so in case i fall asleep, i will hear the pen clatter and reawaken. I discovered it by accident last year but it seems to be rather effective.

Yeah.. You could just actually sleep the night before

While at uni, one does not simply sleep the night before....

I actually used to do something similar. Whenever I had to wake up early I chose to not go to the toilet before going to bed since I have the habit of ignoring my alarms. The urge to pee would always force me to get up. Luckily I never peed myself though.

Sometimes it's just the class/teacher. My history class in middle school was the only place I ever had such a terrible time staying awake in. I could be wide awake going in, but I still found myself nodding off. Id also wake up fully again when I was in another class.

He should have just gone for his masters

one too many..

Get down with OP's pee, get down with OP's pee

How did OP deserve it? Under normal circumstance, if one is in uni/college they're not likely to wet themselves. I've used this method for some classes so I don't fall asleep. It's surprising how your body will, usually except for OP's case, keep itself awake when you have that slight urge to use the restroom.