From Christine Carter, Ph.D. who blogs at Raising Happiness:

"This year, pick just one resolution that research shows will make you happier:

1. Spend more time with friends

2. Everyday, find a way to give something to somebody. My favorite happiness booster is to give thanks

3. Get more sleep and exercise"

Here is a simple book on the topic that I like:

References:

3 New Year’s Resolutions that Will Make You Happier | Greater Good

Source:
http://feedproxy.google.com/~r/CasesBlog/~3/-OLBYOS1a5M/this-year-pick-just-one-resolution-that.html