There is a litmus test you can run on self-help books to know whether they are a waste of money or not. It takes three simples steps, and How To Get What You Want fails them all.
1) Is the goal stated too broad to actually gain the result stated?
Yup. As I read the self-help book How To Use Celtex Writing Program, I am actually understanding how to use the Celtex Writing software. Can I use this to sell my screenplay? No. This book claim to tell me How To Get What I Want, Without Having To Ask. When I got the book I was scheduled to play in a Poker Tournament. I decided what I wanted was to win it. I followed every step the author suggested, but did not win the tournament. The title lied to me. Should the author have limited the title to "at work" or "in your business", which is all he really focuses on, and you decided you wanted to double your salary next week, it would fail yet again. Warning #1, the title's goal is too broad to actually gain the result stated.
2) Thumbing through the book, is there is so much white space that the book would be more than 33% smaller if the print was normal size, the margins wider, or pages of titles were condensed?
OH YES. This "book", if printed with normal margins, would be half its size. Almost every other page is title - a whole page given to a title. If these were single line, this book would be a pamphlet. This kind of padding is the surest sign you should put the book back on the shelf.
3) Are the content headers or titles so generalized as to be fundamentally simple?
HTGWYWWHTA mildly offends in this measure. Just flipping through some pages I get the following titles: Control Yourself, Work Hard, Use The Right Words. There are about six subject titles on the idea of writing things down, each essentially saying the same thing.
In the end, if you failed high school, are fresh out of a long prison sentence, or have been told repeatedly you are rude, inconsiderate, and full of crap - this book may help you. For the rest of us, someone in your life already told you all this stuff. You don't need this book.