There are any number of people who will give you advice on how to be happy. But honestly, there are many things you can do to create happiness, and some tactics will work better than others for any one particular person. CGP Grey takes the opposite tack and explains how you can make yourself miserable. These things are scientifically known to work.
"Oh," you say, "but I've already done all those things." Well than, congratulations, you should be miserable. At least you know why. -via reddit