Comment by Nightrider

If Bill wanted to uncover a hidden talent or keystone habit of his, or to rediscover what made him happy, why, he would revert to his Last Known Working Configuration: http://zerotosuperhero.com/mindhack/find-your-lifes-last-kno...

This "hack" was super useful for me for identifying what habits and activities really improve my quality of life. May be of help to others as well.