Focus on the good things in life. I have great family, wonderful friends, I can pay my bills, I own my own home, I'm reasonably attractive, I'm healthier than anyone I know, I'm still (kind of) young & have my whole life ahead of me.......
This is a hard time of year for a lot of people, but like the song says, you have to accentuate the positive. Sometimes it's the key to survival.