Many other web pages on gambling are just fronts for books on how to beat the casinos with their winning system. These strategies are a scam! If they did work why aren't the people who wrote the books making millions using the strategy as opposed to peddling it for a few bucks on the web? Their strategies are based on certain conditions and fluctuations which rarely happen in the real world.
If you want to win money the only way is to study a particular game. Know it well, know how to play it with the best possible odds, and then you will still probably lose in the long run. However you will stand a better chance of winning in the short run and you won't lose as badly in the long run. There are ways to have a small advantage in poker or blackjack but only through hundreds, even thousands, of hours of study and preparation. There is no easy way! If there were everybody would be doing it.