One of the only thing I talk about in gambling is to be wise whenever you are gambling, gambling require much amount of intelligent and smartness for you to be able to succeed in gambling because it's really a responsible gambler that can fit to this explanation I don't really have much to see but I know that much reply has already been done over this, that is why it's always important for us to be wise,
Responsible and wise, yes those are the two things that can make us avoid various bad possibilities ranging from losing significant amounts of money along with keeping our mental and psychological calm, or what it means is that by being wise then you will really be able to make decisions according to your abilities which can make it easier for you to apply an attitude of responsibility for whatever happens at the end of the session especially defeat.
Another thing I will complement your idea of "success in gambling", success in gambling does not mean that you can get a lot of winnings that make you a rich man for example, but success means when a gambler is able to control his gambling activities properly and in accordance with his abilities without involving excessive actions. Because after all there will never be success to produce something in a place full of uncertainty.