If you're going to be buying something from Amazon, you can use the following link to anonymously donate a small amount to The Lifeboat Foundation.
http://www.amazon.com/gp/homepage.html
I don't have any clue exactly how much they get, but every bit helps.
Someone from Lifeboat might want to confirm this, but it's on the site. I just bookmarked that link early this year to use as my default Amazon page.