1. Find another activity which has similar fun and stop gambling.
2. If you cannot stop gambling, use as little money as possible.
3. Stay away from gambling friends.
You usually just can't stop gambling, if you are addicted to it you will want to play again and again
Person that wants to stop gambling should talk with not-gamblers friends, with family, they will help him, and of course other hobbies will help too, you just can't bet small amounts because it's still gambling, and you will lose money