Donate your time to your local food bank. They spend their day helping others. You should be able to find their phone number in your local phone book or check online.
Donate your time to the mentally handicapped homes in your town. They are always in need of help. You will meet some of the most amazing, sweetest, unselfish people there. Try doing a google search for local homes. Type In AFC , Adult foster care, and see if you can find any homes. Maybe call your local behavioral health, they should be able to get you in contact with some places to help at.
Of course there is always your local salvation army. They are almost always in need of help, wither in the stores or in the kitchen! Will post more as I find more.
Helping others is a great way to spend a day or 2 a week!