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.
The most difficult thing is the psychological control when the market starts to appear red because it will be a time when you will be very difficult to calm down and easily fall into a state of panic. I think this rule is only applicable when the market shows signs of new growth and we will make a profit if we can calm down at all times. Of course these tips are useful but for me this is not the best advice because the bear market often brings surprises to everyone.