This verse will get you alot farther than thinking of sad thoughts we can do nothing about. Just think on the good things and blessings in your own life and how you might bless someone this December with a card, a visit, a cake or cookies, new socks or something that let's them know you care. This is what overcomes evil in the world. Our news sources are only to happy to dwell on the horrific and shocking things to make us tune in. Call a friend to talk about something happy or positive. And if someone wants to talk about tradgedy over and over, you don't need that. Give them the Bible verse and go back to doing something happy.
This might be a class I teach for adults...taking a drawing and turning it into a great quilt. SO much fun.