How do you give?

How do you give back at Christmas? This is the season when everyone is thinking about giving to others and what the true meaning of Christmas is. Well...I've already commented on the true meaning of Christmas, but we are also wanting to teach our children to think about others especially at this time of year by giving to others who don't have as much as we have (not that we have a whole lot of anything). So, my question to you is...how do you give to others at Christmas...or at other times of the year that are not so obvious? Let me know. I always love new ideas.