There are some great resources available on the web. Here is a list of websites that I found helpful:
Great Information
www.bestuniversities.com/blog/2009/100-best-blogs-for-those-who-want-to-change-the-world
http://nicethingstodo.net/home.html
Take Action
www.compassion.com/default_a.htm
www.worldvision.org
www.volunteermatch.org
www.allforgood.org
Misc.
www.klove.com
www.wayfm.com
