My resolution this year is not to lose weight, or to get more excercise. It is to make a dent in my huge backlog. For 3 years, I have been collecting PC games through Steam, Gog.com, and Origin eventhough I didn't have a computer powerful enough to play them. Now that I finally have one, my goal is to complete 1 game from my PC backlog per month all year long.
A pleasant side effect of this is that I will be able to keep track of the games I played this year. I always tend to forget what games I played at the end of the year.