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It is only intentional gamblers that have developed their strategies. I believe that the strategies listed above is style is not followed as in order as it as been listed. But then it is good and we all have some variations of this style that has been developed overtime. "Record the data of the bet" and "Try the demo of the game to practice" is not what gamblers do. Maybe there are few people who do this but I am yet to see them. I would like to see a rough style of how gamblers on this forum.
You need to know that every gambler has the characteristics of how to play each.
For gamblers who like and like to be a little complicated to do some of these methods they will be happy to do it because they really have everything prepared to play and win, but for gamblers who only think for a while and never take everything into account they will never want to do that because they feel they are wasting their time.
I personally always take everything into account and do many ways to minimize the number of losses and increase the chances of winning.