One very good book that will help you get focus on what you want to achieve, is "The Secret". This book talks about a secret has been know for ages that will help you obtain and achieve anything you want in life; if you just ask for it. This secret is "The Law of Attraction", which basically explains that everything you have and that has happened to you, you have attracted to your life.
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or The Secret
Watch here the first 20 minutes of the video: