self-control and discipline among others are really important most especially when you are gambling. You should already have an idea as to how much are you going or willing to lose in a certain gambling session. Having control and discipline, you will be able to follow your plan and do not do any anycesary betting outside of the pre-planned betting session.
Some people have no idea about this yet but they will keep playing until they feel enough. That is why alot of people lose more than what they supposed to lose. I mean we can prevent this from happening if we already set limit from the start, we wont lose more than what we are supposed to. Thats should be considered as smart gambling