There are no sure fire methods that guarantee a win. If you look at the back posts in this Forum you will get many ideas that have potential. In my life I have used dozens of methods. Few were a total failure, but that was because I weeded out the hopeless cases before I got to the casino.
In that sentence is the approach for success. Do your homework, learn and understand the game. Research and practice. It requires Patience and Discipline and probably some expensive setbacks. Like any skill a measure of dedication, but it is not beyond your grasp.