It always helps me to get up early the next morning and look over my notes. But, apparently you haven't prepared at all.. so that won't help. If you have problems studying, talk to your teacher about it. Get extra help after school. Do something about it. Develop a good study habit for yourself. Find a good way that works for you. If you don't do anything about it, your grades will show that & your teachers aren't going to take you seriously.
Good Luck!
