Figure out what really makes you happy. Be specific, and forget about realistic for now. If you don't know, gather information. Become a happiness detective. Think back over your history and reflect on times you've been happy, how long they lasted, and what you learned from those experiences. Expose yourself to new places, people, situations and reflect on how you feel during and after those experiences. Investigate; talk to people about what their happiest moments in life have been. Ask them how long those good feelings lasted, how and why they changed and what feelings followed.