I've recently found this website:
http://therainforestsite.com/
All you have to do is click the button once a day on the website, and you help save rain forests! The companies pay for ads on the click page is what generates the money. Check out the FAQ on the website for more details on how your click helps.
At the top of the page are websites for animal rescue, literacy, breast cancer, hunger, and child health. Click those tabs, and click those websites once a day, also (max you can click is one time a day).
It is a simple way to help make the world a better place, and 365 clicks per year can make a huge difference. There's no reason not to.
So click once today, and everyday! ^_^