Caffeine is still my mood enhancer of choice. I’m sometimes kind of embarrassed at what a difference it makes. I go from crabby to happy in about 30 minutes. The only problem I have is that when I’m crabby I don’t want any caffeine because I don’t want to be happy. Maybe in the future I’ll have a little device implanted that releases happy juice on a set schedule whether I want it or not. I imagine I’ll be perfectly happy with that.