Random Acts of Kindess – Walk a neighbor's dogs for free as often as you can. (It's good for your physical health, too.)
Bake cookies and deliver them to your elderly neighbor, a nursing home, or the nurses and doctors at your local hospital.
A random act of kindness can be as simple as giving someone your place in line.
Volunteer at a soup kitchen on the weekends as often as you can.
Buy supplies for the teachers at your local schools -- even if you don't have kids who go there.