When I find I am having trouble being happy, I go back and look at photos from a trip I took two years ago, which is detailed here: Megatrip.  I was unnaturally happy during the whole trip, and love every moment.  My favorite is a moment when Nick and I were camping on old Gettysburg battlegrounds and had just come from a ghost tour.  We decided to take the moment of terror very seriously and record a snapchat of our haunted campgrounds.