This website was actually made by SF bay area community member Amit Amin. He writes about it here and here. From talking to him, my impression is that much happiness research is pretty low-quality due to the pressure to publish results and whatnot.
BTW, you might want to fix the links--you did them markdown-style, which works for comments but not posts. And maybe cut down on the amount of whitespace in your post some. (E.g. use bullet points?)
John has the correct impression - I actually switched careers nine months ago. I now work as a programmer at a startup.
My most popular post, which brings in 20,000 to 40,000 pageviews a month, was written five months into my career (http://happierhuman.com/benefits-of-gratitude/). Everything after was less popular. Why? Because as my understanding of statistics and methodology improved, my writing possessed fewer bold and enthusiastic claims, which non-LW folk love.
I hold a medium degree of confidence in my latest posts, e.g. my one about meditation. Ever...
I found a website called Happier Human. It's about how to become and stay happier. I've trawled through it. Here are the best posts in my opinion:
[Meditate]. Don't [worry/overthink/fantasise/compare]. [Disregard desire]. [Motivate]. [Exercise gratitude]. [Don’t have kids].
[Buy many small gifts]. [Trade some happiness for productivity]. [Set] [happiness goals]
If you've found any other happiness interventions on any website, please share them.