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1. You shouldn't spend much money because it will harm the family. (Limit your funds)
2. You must have good self-control, it is one of the keys to be successful in gambling.
These 2 is relatively the same because if you have no Self control then you cannot Limit your Money to be spent in gambling.
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4. After you can win in a gambling game, you are better to stop (break for a while). Don't be greedy to push your luck!
again this is connected in Self Control because you will not stand in table specially when you are winning because greed will take over your mind.
but Better to Give also specific target of winnings just like when you allocate losing amount.
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5. Don't expect much to win in gambling, most of them are luck-based. Think rationally!
Exactly this is it,Gambling must not be the place to find money but to find Happiness and if you win?then take it as consolation or a Bonus.