Best Practices for Study Group

I’m starting a study group and was wondering if anyone had any suggestions or tips for maximizing their benefits and avoiding any pitfalls. Format will be to go over a subject area, discuss any questions, and do practice problems together on a weekly basis for 2 hours. We’re all using Schweser and are at same topic. Any good or bad experiences from study groups that you could share would be helpful. Thanks and Good Luck - 95 Days to Go!