LPT Request: Ways to study for exams

When I got straight A's in HS, I normally kept a strict schedule and organized my days really well to make sure I studied for everything here and there. In college, a whole nother story consider every day has random shit (plus I have a gf, random times to meet).

I've heard that studying for 30 minutes, taking a 15 minute break, studying for 30 minutes, 15 minute break, is the best way to study. I haven't really kept a strict schedule on it, but I find myself taking longer breaks than normal.

Coffee certainly helps me, not sure why, but it does. What are your studying for exams/finals tips?