To make the chance of success in quitting high, the effective way that I know is by having something to do that could substitute what you get from gambling. With that said, the only thing I know is having a job that pays, or involve your self in arts and sell your products. The times that you are bored and the time that you do not earn is the key to becoming a gambling addict if we feed it and entertain gambling.
many people have this problem too and i think they are doing some preventing to not playing gambling in every time, including me, because if we know the risk, then we should thinking how to quit from gambling. but i admitted to myself, its too difficult to not playing gambling but i am sure i can reduce my habit for playing gambling and i hope other people can do it too.