Life is complex, especially psychological life.
The most important problems and solutions for life quality, change significantly between people.
It makes it very hard to give any advice, as the most important point differs significantly.
Moreover, certain issues show opposite effects.
Self control, for example, can be destructive, when one is addicted to control and his trouble is being stressed out of control searching.
So some people need to have more self control, while others need to learn to relinquish control.
Others need money, or friends, or to have more fun, more change or more stability, or endless other things.
Are there generalized focal points about happiness and life management?