In my experience, keeping myself busy with work and always spending free time with my family after work and also on weekends is the most effective way. Because it makes me have no time to gamble and focus more on work and family because it will motivate me to do both well and make me excited to get money, and besides that I will think long and do research before doing it if I use money in the wrong way including gambling.
Actually, in any way if we have a serious intention it will definitely work, do it consistently and keep yourself busy with positive things it can also help reduce or overcome excessive gambling activities. Because people who often gamble or are addicted because they have a lot of time to gamble which makes them unable to control themselves.
Distracting yourself with other things will be the best approach when it comes to this so that you will be able to make yourself that getting distracted on playing gambling because on the moment that you do find yourself having those kind of aims and thinking about doing gambling then you will really be just that eventually keeps on playing or going back into it. Also, if you do really mean out on quitting or stopping gambling then you can really just that stop midway. Somehow it wont really be that so simple on this case when it comes into this aspect specially on the time that you are really that being addicted into it, then it is something that gives out that urge that you will really be liking to play no matter what. Self control and discipline o which you will need.