One of the greatest books ever written about the philosophy of success is "Think and Grow Rich" by Napoleon Hill. This timeless book's principals are just a relevant today as when it was published in the 1930's. If you haven't read it or haven't read it lately--why not do so now? .
Napoleon Hill
Get the e-book version "free" along with many other great classics--just follow this link.
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Good luck with your investing.
Dennis