<p>I actually would recommend the reverse - do the group thing first (for homeworks… I never study in groups). Then when polishing everything up or studying, go solo. If the prof or TA offers a review session, go. And start homeworks early. Especially with math, the homeworks were more about thinking than rote problems, so if I started on Sunday I would work a bit on the tricky ones until Wednesday or Thursday when they were due. I typically did at least 4 hours of homework on Sundays, but it really freed up the rest of my week for whatever activities I wanted to do.</p>