Found this through readergirlz:
Children's writer Emily Beeson has declared July 16th to be Tell An Author You Care Day! If you tell an author you care in one of these ways and leave a comment on Emily's blog telling what you did, you can even win an Amazon gift card, to buy more great books from great authors! Here's what you can do:
"1. Write a letter or email to a favorite author. I think JK Rowling and Stephenie Meyer recieve plenty of fan letters. Think of an author you love that may need a little boost.
2. Write a positive review on Amazon and, if you want to, link to it in your blog.
3. Buy a book by a favorite author and give it to someone who will enjoy it.
4. Profile an author in your blog. I'm not talking just another review. Tell us a little about the author and mention at least one of his/her books that you love."
I'll definitely be participating, and so should you!