Being nice to yourself. We all have flaws, especially me, but most of us are pretty good people doing our best. Don't spread yourself too thin, and know both your strengths and your weaknesses.
Community engagement. Get to know your neighbors better. Giving blood, time, expertise and orgasms will make you feel good, too.
While it may be difficult to get these new habits down immediately, a little mindfulness goes a long way. And you would be well-served not to say "app" when you mean application or appetizer. Also, start watching The League if you want to understand middle class, white dudes in their early 30s. Read: Celeb Relationship Resolutions For 2010
P.S. The Washington Post has a great guide to making your real new year's resolutions a reality.