Having a dogmatic adherence to a single investing strategy that you never change can be so dangerous and difficult. Pessimism always sounds smarter than optimism because optimism sounds like a sales pitch. It pays to be a long-term optimist, even if the optimism is what actually pays off in the long run.
There are only a handful of financial rules, ideas, and observations that really move the needle -- and explain the majority of what you need to know to do better with your money.
I could have narrowed this down to 10, but I had fun with this thought experiment, so here are my top 30 rules of the money game.