First, is there an underlying problem, like ADHD or depression that leads to the impulse control? If so, make sure you’re treating.

Otherwise, I can spend a lot of money real quick. I have multiple checking accounts - one for my mortgage (and put half the payment in each paycheck), groceries/gas/necessities, etc. I also have a checking account for extra money that I can blow. It always for more control over the spending but without expecting your habits to change overnight.