Warren Buffett on why the best investors do almost nothing:Buffett explains that the foundation of great investing is knowing which ones to ignore."The most important thing is to decide is to be able to define which ones you can come to an intelligent decision on and which ones are beyond your capacity to evaluate."He illustrates this with a story about meeting Bill Gates in 1991. Gates tried to convince him to buy a computer, telling him it would change everything. Buffett's response was simple