Focus More on the Process than Individual Outcomes Fact or Fiction

Maintain a Checklist to Prevent Catastrophes

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Pilots do the same thing thousands and thousands of times in their lives, but they still go through the physical pre-flight checklist to eliminate what could be a catastrophic error if they try to circumvent it. Investors are well served by having similar types of checklists and sticking with them.
Source: http://www.valueinvestorinsight.com/