Avoiding stupidity is easier than seeking brilliance -or- It's much easier to avoid what you don't want than to get what you do want. This is the technique used by Charlie Munger, who works alongside Warren Buffett at Berkshire Hathaway, one of the worlds most successful investment companies.

By keeping things simple, you can often outlast the competition, because sooner or later, they will do something stupid, simply because they though they were doing something brilliant.

Warren Buffett has come out with interesting, and potentially useful quotes :-

• We simply attempt to be fearful when others are greedy and to be greedy only when others are fearful.
  
  
• Price is what you pay. Value is what you get.
  
  
• Someone's sitting in the shade today because someone planted a tree a long time ago.
  
  
• Spend each day trying to be a little wiser than you were when you woke up. Discharge your duties faithfully and well. Systematically you get ahead, but not necessarily in fast spurts. Nevertheless, you build discipline by preparing for fast spurts. Slug it out one inch at a time, day by day. At the end of the day - if you live long enough - most people get what they deserve.
  

Charles Thomas Munger is an American investor, businessman, former real estate attorney and philanthropist. He is vice chairman of Warren Buffett's investment vehicle "Berkshire Hathaway". Buffett has described Munger as his partner because Charlie would rather employ people who under-estimate their IQ, over some one who over-estimates theirs. His net worth is reported to be around $1.8 Billion in 2019 but only pays him self $100 thousand.