It's not easy, and you probably won't get it right at first ( see also\# 4) but once you do this, you'll have something concrete to work from ( and to modify in the future). Start small and work your way up.
Build upon just a small step, a small thing if you like. Start building an upward spiral of positivity and good feelings within. And then take further steps upward. Towards what you know you really want and you know are the right things for you in your life.