Christmas is a perfect opporunity to think about people in need in your community and around the world. What a perfect excuse to purchcase a gift of a charitable donation. Or to buy something fair trade or organic or locally made, or something you make yourself or do as a service. Or give someone you don't know something they need.
I'm inspired by a friend who's decided to gather a couple others and spend his day visiting elderly people who don't have any friends to talk to. Delivering a card and a smile. They don't need material things at this time of year. Just a little time.
I consider acts like these to be community-building; sustainability - seeing a need and filling it. What can I do like this over the holidays?