Your life is a reflection of what you believe. If you really believe something or someone can stop you, it can and it will. But you already know that. What you may not know is that what you tell yourself about yourself, about your life, about your limitations, you will believe. What you believe is the foundation of what you do and don't do.
Check out the "S.M.A.R.T goals" section on my blogs for more direction & ideas, one of them is sure to fit you, start using it today.