Thank you notes. Never forget 'em. They will endure you to your donors and perhaps keep their interest up for next year. When you don't thank a donor you run the risk of burning bridges. Most people I know are pretty careful about where they put their money. If they notice that their hard-earned cash which they so generously gave away to a few weird teenagers wasn't even acknowledged theeennn you might be sunk. While most of your friends might be very kind and probably wouldn't mind all that much if they never received a thank you note, it's a good practice to keep up.
I like to keep a clipboard near the baked goods, decorated jar, or the door of the party for guests to write down their names and adresses if they'd like. (If they wouldn't like don't stress about it.) You could send them a handwritten or preprinted notecard. I've written up a note to preprint and send out postcard style that seems to work pretty well. The downside to that method though is that I need drag myself to the printer's ; ) Play with some ideas and see what works best for you. Perhaps goodie bags would be a good way to thank your guests or maybe an email newsletter during the convention itself? There are many ways to go about the art of gratitude.
