See it first in your mind, then become it.
Too often, people get stuck in a state of over-thinking, the result is that they never reach a decision.
You have to create your self-belief by going to your core to find the probable reasons for the negativity in you, and then demolish them.
It is one thing to know what should be done, it is another to do it.
Just identify the very first physical action you need to take, and do it.
It is true to say that the secret of a winning formula is the ability to accept that there is a vast area of unexploited potential beyond what you currently perceive to be your maximum.