This technique requires that you keep a cursory "fun journal" on a calendar. Every day, jot down a brief list of your major activities. Give each experience a fun "score," with zero meaning no fun and ten meaning fun-tabulous. As the days go by, you'll begin to see which activities and people yield the most fun—and you'll be surprised.
My clients almost always find that the activities they think will be supremely fun (eating dinner at the Ritz) consistently rank lower than things they've been taking for granted (eating Ritz crackers for dinner). Almost all of us can have wonderful fun without nearly as much money, education, beauty and power as we think we need.