Ran across The Give List on idealist's blog. The Give List marks 71 ways to give without opening your wallet - a great idea not only holiday recession season, but also great ideas to add to appeal letters.
A favorite of mine that's incredibly easy, from LA Chamber Orchestra:
"If your favorite arts organization has a blog, a facebook page, or some other form of social networking – leave a comment, post on their wall, or just send them an email telling them what you love about that organization."
What other ideas would you add to your Gift List?