Vast amounts of knowledge are continually generated about what leads to human well being, both scientifically and culturally.
The real challenge IMHO, is that most people don't like the answers or want to make improvements.
The real challenge IMHO, is that most people don't like the answers or want to make improvements.
Building and maintaining social connections is very important.
Exercise and healthy diet are very important.
Personally helping others is very rewarding.
Comparing yourself to others is very detrimental.
Fixating on things and people you dislike is very detrimental.
Most of these are things that people are told as a child and struggle to do. Most of them you can't buy, outsource, or regulate.
My personal axe I like grinding is TV. The average American watches 20+ hours of TV a week. On average, I don't think it helps their long term happiness and I don't think it is restful.
I think most people would be happier if they literally stared at a wall or slept instead, let alone if they did some of the things I listed above.
https://adam.nz/2001/zen-tv-experiment/
I don't agree with everything written in that essay and reject the Zen aspect but it was definitely a life-changing moment for me.