Where you can help:

Volunteers of America is one the nation's largest and most comprehensive human services organizations, serving more than 2 million people each year, including at-risk youth, the frail elderly, men and women returning from prison, homeless individuals and families, people with disabilities, and those recovering from addictions. http://www.voa.org/

Helping students get real for seventeen years.
Landmark Volunteers is a nonprofit organization giving high school students the opportunity to make a real difference in the world around them through volunteer opportunities with 58 leading organizations across the country.
http://www.volunteers.com

The American Red Cross helps people in emergencies every day. Whether its half a million disaster victims or one sick child who needs blood, Our vital work is made possible by people like you, who learn how good it can feel to lend a helping hand. http://www.redcross.org/services/volunteer/0,1082,0_325_,00.html
The American Red Cross needs you!

Be a volunteer for the United Nations
For tens of millions of people around the world, volunteering is an expression of support for a principle that strikes to the heart of the United Nations system: that by working together, we can make the world a better place for everyone.
http://www.unv.org/how-to-volunteer.html

The Wonder of Reading In Los Angeles, CA
Become a Reading Partner to a struggling reader!
http://www.wonderofreading.org/volunteers_read.htm