Here’s a cool app out of a research project at the London School of Economics: Mappiness. Throughout the day, you enter a few key things about how you feel and what you’re doing and the app maps out what has you be most happy.
You’ll be able to track what situations you are most happy in and where. I think this is great because it might not be what you think. Also, you can notice when you aren’t that happy and learn what can improve your mood. Mood is an internal experience of association, not an external accident.