It is difficult to achieve your goal without a dream. You need to dream big and think big! Your dream must become your vision. Be bold! Dramatize your ideas and make them so crazy they might just work out.
Try to see how you will manage your idea. Take it one step at a time. Think about all of your possible steps, where are your difficulties and how will you overcome them. Try to think about your emotions as well. How will you react to the struggle? How can you anticipate on the possible emotional troubles?
Now ... when all of the preparation is done... get moving and make it happen. You are prepared! Not for every possible problem... but you are prepared! This should give you enough confidence to out and do what must be done to achieve your GOAL!
Be great! Nothing else pays!