Dr. Krumboltz talks about the importance of testing out one's dreams. Dreaming itself cannot make your dream come true. You must test it and do something with it. It is important to execute what's in your mind within the circle of your influence.

Update:

Planning your life is not a dumb thing at all.  Although you cannot design your future very specifically, you can still plan your future. Through reflection and self-discovery process, you can find relatively stable values, motives, and skills of yours.  You CAN build your anticipated future lifestyle and key accomplishments. Your HEART will say whether it is possible or not. If you are certain about the path to make your dreams come true, you can really make it.