Do you have the Stumble Upon toolbar?
If you don't, you should have. With Stumble Upon, you indicate your interests and when you hit the Stumble button, you're sent a page from a website or blog that matches your interest. Who has time to randomly search the Web for interesting sites anymore?
Anyway, if you do have the toolbar, or get it anytime before May 2, the first page you see will be from Stumble Upon. If you click a 'thumbs up" for the page, Stumble Upon will plant a tree with the National Forest Foundation.
How easy is that?