Bottom line, don't gamble. But if you're stupid, then:
18+ | Gamble Responsibly | BeGambleAware.org
Don't think of gambling as a way to make money. Only gamble with money you can afford to lose.
Set a money & time limit in advance. Never chase your losses. Don't gamble when depressed or upset.
Take frequent breaks. Don't drink or use drugs when gambling.
Visit
BeGambleAware.org for help.