A brilliant person will forget/overlook

No one is immune. The most experienced builder, surgeon, stock trader still forgets or overlooks something that in retrospect seems and is completely obvious. I have a 9 page checklist presently for my investing activities that I need to and can shorten to something very simple. The longer version I can read once a month maybe. The shorter list, every time and before every trade execution. Highlly recommended. So simple. So smart.