Budget: set it BEFORE you start gambling and stick to it.
I have seen some people who have planned to do it before the start of their gambling for the day, but the anxiety about recouping their losses always makes them have more stake than they have planned.
Have a break from time to time, it is important to let your brain stop and consider.
That's very necessary. Someone's brain is not a machine. Once it has been stretched, relaxation is what it needs to give the body and soul a proper atmosphere of reasoning