Gambling should always be treated with a cool head. Emotions are superfluous here. If you show unnecessary emotions, you will lose. There is no place for impulsive people in serious gambling, everything must be calculated.
Aside from that, it isn't bad to have a plan for every gambling session. It is one way of gambling responsibly. Planning the time allocation, money to spend on bankroll, and keeping a tab of the time is one of the things we must consider in playing a Casino game.
Few people can keep their emotions from rising because of various things during their gambling, which happens to many gamblers. By keeping their emotions in check, they will be able to think even if they experience defeat and maybe they will be able to stop for a moment or even stop and leave the gambling place. It also depends on how much they can be responsible for themselves so they do not have to keep playing gambling without stopping.