These rules are from Benj's book, The Uncommon Investor: A Contrarian Guide to Investing in the Stock Market. A new edition will be published in the fall of 2008.

• A
  A Contrarian Chooses When to Go Against the Crowd
  Always Set a Sell Target
  Always Think in percentage Terms
  Analyze Your Mistakes
  Ask Yourself: When Is Enough, Enough?
  Avoid Crowd Psychology
  Avoid Debt-Laden Companies
  
  
• B
  Be Lazy and Let Others Do Research for You
  Beat the Market. Not Yourself
  Before Buying, Check the Order Quantities
  Before Buying, Test Your Idea on People You Respect
  Buy on Weakness. Sell on Strength
  Buy the Management. Check Her/His Track Record
  Buy When a Stock Has Few Friends
  Buying Dividend-Paying Stocks Is a Definitive Advantage
  
  
• C
  Carefully Consider Buying in December
  Carefully Match Your Personal and Investment Needs
  Check How Much of the Corporation Management Owns
  Check Demographic Trends
  Check for Insider Trading
  
  
• D
  Defer Taxes Where Possible
  Diversify
  Divide Your Funds into Weighted Investment Packages
  Do Not Fear Numbers
  Do Not Invest a Specified Amount in Stocks Every Month
  Do Tax Planning
  Do Well, While Doing Good
  Don't Always Focus on Money, Make Dinner With Your Honey
  Don't Believe that Something Cheap Is Necessarily Undervalued
  Don't Be a Trader. Invest for the Long Term
  Don't Invest More than You Can Afford to Lose
  
  
• E
  Every Six Weeks, Review Every Stock
  Examine the Ten-Year Price Range
  
  
• H
  High R&D Expenditures Are a Positive Long-Term Indicator
  Higher Risk, Higher Potential Reward
  History Is an Excellent Teacher
  
  
• I
  If a Stock Sinks, Consider Averaging Down
  If You Miss One Train, Another Will Come Along
  Imagine the Worst Case Scenario
  Invest Early and Often
  Invest So You Can Sleep Comfortably
  
  
• K
  Know Thyself
  
  
• L
  Learn to Understand Financial Statements
  
  
• N
  Never Average Up
  Never Buy a Stock You Think Will Undergo a Share Consolidation
  Never Buy Firms With a Share Price over $25
  Never Buy on Margin
  Never Buy on Rumour. Do Research
  Never Give a Broker Discretionary Power
  Never Short a Stock
  Never Use Stop Losses
  
  
• O
  Over Time, Mutual Funds Perform Worse than the Overall Markets
  Over the Long Term, Luck Balances Out
  Only Consider Stocks Trading Within 30 Percent of Their 52-Week Low
  Only Consider Stocks Trading At Less than 50 Percent of Their 52-Week High
  Only Buy Corporations that Have Been Listed for a Minimum of Ten Years
  Only Buy Stocks Listed on Major Exchanges
  
  
• P
  Patience
  Pay Off Your Debts
  
  
• R
  Reanalyze but Don't Ulcerate over Your Sales
  Reevaluate the Stock Carefully When Considering a Sale
  Reevaluate Your System Periodically, Allowing It to Evolve
  Review Stocks You Own Every Three Months, Concentrating on Their Debt
  
  
• S
  Search for a Broker With Experience
  Sell a Minimum of 50 Percent of the Stock Near the Target
  Set Realistic Financial Goals
  Split Assets between Different Institutions for Safety
  Stockbrokers' Results Typically Lag the Market Averages
  Study Management
  
  
• T
  Take Carefully Calculated Risks
  Take Periodic Breaks from the Market
  Talk to Management
  The Greater the Diversification, the Lower the Rate of Return
  The Lower the Stock Price, the Greater Both the Risks and Rewards
  The Target Price Must Be a Minimum of 50 Percent Higher than the Buy Price
  Try to Store Money for Emergencies
  
  
• W
  Wait to Tender on a Takeover
  Watch Trading Volumes
  What Will I Give Back?
  Without Discipline, You Have No Method
  Write the Corporation for Information
  Write a Stock Watch List
  
  
• . . . Sit . . . Relax . . . Wait . . .