Next is a more complicated thing but important. Go to a true naysayer in your life. We all have them. Someone who always sees your glass half full. Someone who whether they admit it or not wants to see you fail or at least not pass them by. Your task is to tell them your "x" and listen to them work in all the reasons you should not or could not. Let them get it all out because this is the last time you will involve them in your journey towards "x". If they happen to say anything constructive capture it, you may need it along the way. Sometimes even the worst critics can show us something helpful about ourselves.
Do not argue with this person. Stand there and take it. Trust me.
Then when they are finished being themselves with your stuff walk away. "We can show them better than we can tell them."
Return to your mirror clutch your "x" in your hand and tell yourself, "I am on my way,"
Remember you serve a God who will not allow you to fail.