Always remember that controlling yourself is a must, why? because gambling responsibly is the most important since we are dealing with a high-risk activity here.
Yes, controlling ourselves will help sustaining in gambling. If we are going with lack of control then we can easily lose all our bankroll within blink of eye. Still, remembering responsibility and gaining all the control over what we are doing will not sure anything because just having these are all not enough for making profits in gambling but you must have another factor as well to make profits in gambling which must be your luck factor.