“Everything is interconnected. Gratitude improves sleep. Sleep reduces pain. Reduced pain improves your mood. Improved mood reduces anxiety, which improves focus and planning. Focus and planning help with decision making. Decision making further reduces anxiety and improves enjoyment. Enjoyment gives you more to be grateful for, which keeps that loop of the upward spiral going. Enjoyment also makes it more likely you'll exercise and be social, which, in turn, will make you happier.”
--UCLA Neuroscience researcher Alex Korb

Four Rituals that Make You Happy:

(in summary, and as suggested by science to date)
1. Be grateful.
2. Name negative emotions.

3. Make good enough decisions.

4. Touch people.

SOURCE: http://theweek.com/articles/601157/neuroscience-reveals-4-rituals-that-make-happy