Start with money that has no other job
Choose a spending limit before opening a game, after rent, bills, food and other commitments are covered. That limit is the amount you can afford to lose, not an amount you expect to get back. Keep savings, borrowed money and money belonging to someone else out of the session.
A possible game payout does not change what you can afford today. Reaching a limit is a reason to finish, even if the last round was disappointing or the next feature looks appealing. Adding money to recover an earlier loss turns the original limit into a moving target.
