First of all, this is risk management and money management. The second is probably unsystematic play. Let me make a reservation that I do not mean casinos, as well as people playing "for fun". I mean sports betting.
So, how much did your mistakes cost? Did they cause you a serious psychological blow? What were your mistakes, did you learn from these mistakes and do you apply this knowledge in practice now? Were these mistakes simply painful, dramatic or catastrophic?
Yeah we all started our gambling journey inexperienced and we get along and each mistakes gives us reasons to learn and know what steps to take next. Though i begin sport betting at first with the mindset of earning more than I can imagine but along the line having generated loses constantly my thoughts switched back, and tha was how i learnt just as I betted and thus it's been what has helped me.