Psychological principle: What you focus on gets bigger.
(or how I like to think of it -- the Hurricane Principle)
This principle can work for you or against you. You keep worrying, fretting, obsessing on why you're not yet successful or what's wrong in your life and, per this principle, those thoughts keep swirling in your mind, getting bigger and bigger until the fear of failure becomes the fact of your reality!
Conversely, when you begin to pay attention to, recognize and praise small steps of achievement, like a hurricane gaining momentum, you too can become who you want to become!