Jesse Livermore's 21 Trading Rules:

• Money cannot consistently be made trading every day or every week during the year.
• Don’t trust your own opinion and back your judgment
• Nothing new ever occurs in the business of speculating or investing in securities and commodities.
• until the action of the market itself confirms your opinion.
• Markets are never wrong – opinions often are.
• The real money made in speculating has been in commitments showing in profit right from the start.
• As long as a stock is acting right, and the market is right, do not be in a hurry to take profits.
• One should never permit speculative ventures to run into investments.
• The money lost by speculation alone is small compared with the gigantic sums lost by so-called investors who have let their investments ride.
• Never buy a stock because it has had a big decline from its previous high.
• Never sell a stock because it seems high-priced.
• I become a buyer as soon as a stock makes a new high on its movement after having had a normal reaction.
• Never average losses.
• The human side of every person is the greatest enemy of the average investor or speculator.
• Wishful thinking must be banished.
• Big movements take time to develop.
• It is not good to be too curious about all the reasons behind price movements.
• It is much easier to watch a few than many.
• If you cannot make money out of the leading active issues, you are not going to make money out of the stock market as a whole.
• The leaders of today may not be the leaders of two years from now.
• Do not become completely bearish or bullish on the whole market because one stock in some particular group has plainly reversed its course from the general trend.
• Few people ever make money on tips. Beware of inside information. If there was easy money lying around, no one would be forcing it into your pocket.

Web source: http://www.businessinsider.com/jesse-livermores-trading-rules-2014-9