1) Preparation Time at the table. At least 5 minutes would be good, but closer to 15. GM's should bear this in mind when pacing their games, so they finish up to 15 minutes before the start of the next event at that table. 2) How to Find Alternate Players. If fewer people than expected show up, and the GM wants to add a few more players he should know where to look. There should be a rallying point where people can wait to be called, where they can otherwise sit down and take a break. Those players would ideally be there in the first half hour into an hour, if the events start on the hour. After setting up my table, and giving my players their materials, while they are reading and picking spells I could take a walk over there and invite people. 3) Miniature, Tiles, and Props. It would be terrific if we could stop by an area and look through some boxes with donated miniatures and tiles people didn't need anymore. Battle mats, miniatures, tiles and other props all the way up to dice towers would help us make our events as much fun as they can be. GM's could take responsibility for them, and not only bring them back after their events but file them back properly if you have a filing system for them. 4) A Thread for their Events. If you sign up for someone's event, you can post in their thread here and talk with them. The GM can share more information about the event, and you can let them know if you won't be able to make it to the game after all.