These are 12 researched strategies for sustainable happiness adaptation written by Sonja Lyubomirsky as published in the Scientific Approach to Getting the Life you Want The How of Happiness (Penguin 2007).
Express gratitude for what you have, through contemplation, journaling or verbally sharing your appreciation for others.
Keep a journal and write about the best possible future for yourself.
Minimize dwelling on problems and comparing yourself to others.
Choose a relationship in need of strengthening and invest time and energy in healing, affirming and enjoying it.
Increase the number of experiences at home and at work in which you "lose" yourself.
Select several significant, meaningful goals and devote time and effort to pursuing them.
Keep a journal or write a letter to let go of anger and resentment.