High school, I studied for a little while at night, but mainly the two hours I was stuck at school early. College, meh, I was the queen of cramming.
Language school, I studied from time to time, but mainly cramming.
Studying on my own (before the JLPT and now learning Chinese), I'll spend my weekends studying some times. When I worked as an ALT at a junior high, I spent all of my free periods studying Japanese. I try to spend at least thirty minutes a day on Chinese, and consider my gaming time Japanese study time, since all my games are in Japanese. Yeah, sure, I'm mainly learning useless Japanese (when am I ever going to have to say, "I'll clear the way of enemies"?) but some of the vocab I've picked up has come in handy (namely science terms, like "embryo" and "synthesis.")