I'm reading on another post about how to run a game day, and this response came from Pirate Cat:
Other pieces of advice: (we've held two already) (these are for the day of type issues, not getting started. Piratecat covered most of that stuff.)
-KEEP to the SCHEDULE. DO NOT let the first game start late.
-Order lunch (if ordering) a full hour before the lunch "hour" starts.
-Circulate menus at the BEGINNING of the first game slot. Photocopy them in advance if neccessary. Inform everybody you will pick up MONEY and a notecard with their pre-WRITTEN order at a specific time. Do not be the orderer/notecard collector if you are DMing your own slot.
-Warn your guests about your (hypothetical) pets or offspring.
-Make a clear policy about accompanying offspring - are babies and toddlers allowed? (Yes in our house) Are teenaged offspring allowed to play? (Also yes) Pre-teen? (Also yes, case by case basis) Younger? (hasn't come up yet)
-Test drive the directions yourself. Pay attention to stuff you take for granted that might be confusing to non-locals.
-Find out the intricacies of parking near you. Be SURE which streets are legal for non-residents for an all-day event.
-Research local hotels and provide opinions and directions from them as well. Hotels near porn stores tend to be less popular. Oddly enough.
-Include the possibility for a game not happening, and people needing something to do: ask people to bring card games or board games or minis and mats, etc.
-Post many copies of the schedule around the house.
-Label things in the kitchen, including recycling, trash, water, ice, soda, etc.
-Take assessment of your rooms' amenities (darkness/lightness, tabletop space, stereo, ability to shut door) and match them to the DMs' needs for their games.
-PUT YOUR NAME IN ALL YOUR GAME BOOKS BEFORE HAND
EDIT: Holy crap, forgot a very important one: back up the schedule post daily. Save it to a text file every day, and print it out every now and then.