I am wondering should Study a lot, a little or, not at all? Please let me know, your advice.
Whatever you do, the most important thing the night before is to get a GOOD NIGHT’S SLEEP.
If you have time - review the things you think you might be weak on – each course has a detailed description from the College Board; go over the format of test and time for each section, gather any materials (calculator?) needed. And get a good night’s sleep! Good luck.
Agree with @GMTplus7 - Sleep.