Christians, how do you give up your will?

I am very strong-willed and I am a planner. I am goal oriented and very ambitious. In a worldly way, those are great things but since I have been a Christian for the past several years, I have realized maybe it's not such a good thing. I have been like this since I was a child and it always worked for me but not anymore. Now, I am just confused and frustrated =) I can't begin to think of not planning every move in my life and having my own goals. It is frustrating for me not to know how things will turn out. Help!