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References :

The Philosophy of Achievement
As a result of Napoleons studies via Carnegie's introductions, the Philosophy of Achievement was offered as a formula for rags-to-riches success by Hill and Carnegie, published initially in 1928 as a study course called, The Law of Success. The Achievement formula was detailed further and published in home-study courses, including the seventeen-volume "Mental Dynamite" series until 1941.[citation needed]

Hill later called his personal success teachings "The Philosophy of Achievement" and he considered freedom, democracy, capitalism, and harmony to be important contributing elements. For without these foundations to build upon, as Hill demonstrated throughout his writings, successful personal achievements are not possible. He contrasted his philosophy with others, and thought Achievement was superior and responsible for the success Americans enjoyed for the better part of two centuries. Fear and selfishness had no part to play in his philosophy, and Hill considered them to be the source of failure for unsuccessful people.[citation needed]

The secret of Achievement was tantalizingly offered to readers of Think and Grow Rich, and was never named directly as Hill felt discovering it for themselves would provide readers with the most benefit. Hill presented the idea of a "Definite Major Purpose" as a challenge to his readers, to make them ask of themselves "in what do you truly believe?" For according to Hill, 98% of people had no firm beliefs, putting true success firmly out of reach.[citation needed]

Hill's numerous books have sold millions of copies, proving that the secret of Achievement is still highly sought-after by modern Americans. Hill dealt with many controversial subjects through his writings including racism, slavery, oppression, failure, revolution, war and poverty. Persevering and then succeeding in spite of these obstacles using the philosophy of Achievement, Hill stated, was the responsibility of every American.
References :
http://en.wikipedia.org/wiki/Napoleon_Hill#Writings_and_other_works

It's about teaching yourself to set your mind on something and not losing focus. Keeping your eye on the prize, so to speak.

He took that simple concept and made a lot of money with the book. The anecdotes are sometimes questionable in that book, too.
References :
Read the book and felt scammed.

The secret in Napoleon Hill Motivation ideas is that the person who perseveres, believes in themselves, practices self discipline, has a strong determination to succeed, and a grand vision (imagination) of seeing one success thorough will succeed in achieving their goal in life. The important thing about this principals as enunciated by Napoleon Hill are damn really good if you put them to practice and apply them to your daily life.
References :

The book is 99 per cent useless, really.

There are much better business-success oriented book out there only nowhere is there any of that think and grow rich crap.

Suggestions: A really great writer named Malcom Gadwell, for example who wrote a couple of books recently – most famous "Blink" and also another "Tipping Point" both New York Times Best List.
Great read on topics in psychology that will make you a better thinker, listener, etc.

Suggestion: (it is out of print) Frogs into Princes, a book on psychology and how to "reframe" how you think.

These are book that actually show and explain how to do something versus that Napoleon Hill, Dale Carnegie, Dr. Phil McGraw crap.

As is often the case, the good stuff just does not seem to hit the mainstream. There are exceptions, of course… try the couple of suggestions
References :
I read a lot, and am pretty successful

I would like to see a book that tells exactly how to get rich. Positive thinking is great, I mean sincerely, but know how is it!