Hi, I have an exam tomorrow which I am not nearly prepared for. I also had one today and am pretty tired right now. Should I

1. stay up all night drinking coffee and studying then go to exam 9.45-12.15?
2. go to bed soon and get up at 5am to study for 4.5 hours before exam?
3. study till I can't stay awake any more, sleep for a few hours then do exam?
4.other, if so specify

It's Equity and Trusts. I'm never going to assume I can cram for an exam the day before ever again.