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.
This is the most common factor majority people will bet more into it when they start losing money and this frustration makes them lose more money through gambling. Frustration makes us lose more money in gambling, the only option we have is while losing we have to quit gambling for some time.