It's really a good advice you have given to us here and I think the major problem is been able to keep those tip. I do believe that majority of us know all this point you have listed but keeping them is the really problems with investments and trading. For example it is impossible to keep trading when you know that the market is going against you and you are lose.
It's really hard to trade and make profits if the market turns into sideways so better wait for a good timing to trade. Your tips are very helpful especially for newbies but the problem is putting them into actions which i think might be quite hard not just for newbies but even with those old traders.