I think that much rich world unhappiness stems from spending a lot of time watching TV or playing video games. If you spend your time playing (e.g. hanging out with friends, playing sports) or working (e.g. accomplishing something), then I think happiness is more likely.

The last sentence in particular resonated with me: “Happiness is not measured by the number of days you live but, rather, by the number of days you remember.” Every day I've spent consuming media is a day I can not remember.