If you want to gamble responsibly, you should pre-set your limits. And stick to your own rules.In that way you'd enjoy your gambling.
When people start to loose, they tend to be aggressive and bet more and while people start to win, they become overexcited and gamble recklessly as the luck is all in their favor. Be a person of reasoning and you'll always win.
Limits are only set to be broken. An addicted gambler is considered as an addict because they break their own rules just because they have to feed their inner hunger of greed. While this is definitely bad but they are helpless against it.
Being aggressive about playing what you say, happens when losses start increasing. That is obviously going to happen. That's how the casino will make use of your emotions against you.