We always do operation christmas child. In the past we have sponsored a family in need. Last year our young adult (college aged) group that we led adopted a home of about 12 mentally handicapped adults and took them gifts, games & a complete christmas movie night.
My favorite thing that I get to do is to take communion with our shut in's and some nursing home residents. My favorite year was when my wife and our then 6 year old daughter went with me.