One extremely helpful format for a leader meeting, especially for Small Group/Sunday School leaders is a VHS meeting.  I learned this from a leader at our Baptist State Convention.  In an hour spend 20 minutes in each of these sections:

Vision-Lay out your heart and passion for where you are taking this group.  Remember, you are leading this group somewhere.

Huddle-Allow time for your leader teams to cluster and plan.  Make yourself available to all and answer questions, pray, get resources, wash feet or whatever.  Serve them!

Skill-Give your leaders something they can take away.  Feed them, train them, grow them.  Again, if you are not responsible for this, who is?  Dream a bit on this one.  Ideas: have someone speak on how to facilitate small groups, or how to handle crisis calls.  Survey your leaders, or lead a skill based on a current issue.

Cancel boring meetings.  Do not read the calendar.  Image the meeting you would want to attend, and then make it yours.  Stir your leaders!