- Don't put all your available bankroll directly in the game..
- One must stop after reaching a certain goal.
- If you're doing really good, withdraw part of your earnings.
Having a big bankroll can make you feel falsely safe in that "oh I'll just keep increasing my bet until I win" but alas, the 30 reds in a row do exist, and will come. Do not let them take it all. The goal you make should be realistic and firm, Don't change it or else be prepared to face bad consequences. You gotta fight back the voice that screams inside your brain "Come on, double again and we recover!".
It can be easy to some but others can not control themselves. Although i agree with the tips above.
Also i believe that stop drinking alcohol when in casino or gambling because it alters your brain,being intoxicated will give you fake hope and courage that makes gamble more.