You need that self-discipline to make sure that you will practice whatever you setup before playing, else, you will messed around.
Once excitement is already there, to me, it gives me the thrill and wanting to gamble more. I'm losing my self discipline with that but it knocks me out whenever I start to have a losing streak. It's good on my end that it wakes up whenever I feel that way. Because setting up yourself before you gamble is needed that you'll have your own book and rule to follow. Easy to say sometimes that we can control ourselves but, once you're already on that momentum, I doubt that you'll have that control anymore.