Forming the group - An effective study group ideally has 3-4 members (no more than 5). Your group should meet at least once a week, and you should decide how long you want your sessions to be. All members should make a serious commitment to show up and to do the required preparation prior to any group meeting. If you show up unprepared, it will impact how effective that session is for the whole group, not to mention what you could get out of those sessions.