I attend church with an woman whose niece was killed a year ago in Sandy Hook school shooting. Their family is encouraging a campaign of service on the anniversary, December 14, 2014, with the goal of not letting evil win. Our family is going to do something, I hope you will, too.
I think one of the causes of Sandy Hook, Columbine etc is social alienation. It might be appropriate to support anti-bullying projects, and/or help certain eccentric individuals integrate and become socially happy.