I just ran across a story (by columnist James Ragland) about a woman who donated bone marrow on her birthday because the need was there.
I know that for some people this is not an option for health reasons or religious reasons, but for those of you who CAN... what have you donated lately? Consider gathering with a group of friends to donate blood. I have a friend who manufactures an excess of platelets so she donates her platelets! Donate plasma! Are you brave enough to donate bone marrow? What the heck, research it and find out.
Too nervous about all that squishy stuff? How about hair? Locks of love? Not too scary.
And if you just can't bring yourself to do it for whatever reason (bald, nervous, anemic, etc) how about volunteering your time? Find out when the next blood drive is and take some jugs of juice down there. Call first and ask what you can do to help. It all counts. Fill up that karmic bank account of yours!