Everybody remembers: the feeling you got from taking the first step. The magic feeling that you are on the move, something is happening, you are moving towards something.
Also everybody remembers, or knows, the feeling you get from sitting down and thinking about moving. The feeling you are stuck, want to do, want to move, and are not doing it.
I would say: take the first step, just one small step forward. The miracle of your success is not there when you finish, it will be there in the beginning. That you had enough courage to begin.
So, get up and get moving.