It could be a valid alternative to limit yourself, but the effectiveness of the rules is in our mind.
If we cannot control our emotions they will become like a snowball that slowly turns into an avalanche.
Imposing our thoughts not to commit these foolish things is a matter of habit and rigidity in respecting the rules,
if we have an unruly life we will not easily be able to keep calm even with a notebook!
I think in this case it’s not about emotions but about discipline, how well you can stick to certain rules. I remember I once made a list of trading rules. I think there were seven points, and I always kept them on my desk because at certain moments I kept making the same mistakes over and over again. But when I created that list of rules and put it in front of me, it helped me follow those rules much better. So I think this approach can work. Making a list like this shows how serious you are about gambling because if it's for fun, no one will do it.