Fear will be the single factor which stops you from achieving your goal.
Fear of what?
To answer this question we need to be totally honest with ourselves. Men will generally find this a difficult reflection.
Write this question down
Have you clearly defined the things you are afraid of?
My mentor suggested me, and my wife explore this question. 6 years into our relationship as I had no idea what she was afraid of.
Now pick one of those fears,
What would happen if it came to pass?
Did you come out alive?
Was there a setback? How bad was it?
Are you able to still take a step forward?
If the answer is yes, then do that thing you were putting off.