Elder M. Russell Ballard of the Quorum of the Twelve Apostles shares some thoughts on this subject.
How Do I Achieve My Goals?10481_000_040
You must cultivate a desire to develop the skill of setting worthy and realistic goals.
If your goals are righteous, then go for them.
When you set a goal and commit yourself to the necessary self-discipline to reach that goal, you will eliminate most of the problems in your life. Spend your energies doing those things that will make a difference.
We have to have faith. We have to have faith in God. We have to have faith in the Lord Jesus Christ. And oh, how desperately we have to have faith in ourselves.