Writing down what you're thankful for is one of the most researched happiness practices there is. Join the free Thnx4 challenge from UC Berkeley's Greater Good Science Center.
Create an account at thnx4.org — the Greater Good Science Center's online, sharable gratitude journal.
Jot down the things — big or small — you're thankful for. A few minutes every couple of days is all it takes.
Track how your mood shifts over the challenge, and see what the science of gratitude looks like in your own life.
The challenge is free, takes minutes a day, and pairs perfectly with the daily activities on the Gratitude Month calendar.