i think the best thing for this matter for us not become an addict in the gambling online is that the individual gamblers must do this as one of His/Her hobbies only, if they do this addiction in it will not come to anyone. Just don't allow greediness to control us so that in the end addiction has no power to us here in any of the gambling casino.
That's easier said than done because as a gambler, we will be getting this challenge not to become greedy and avoid getting addicted every time we get to gamble, we surely would not want to become those gambling addicts who badly need some help to get their life straight again. I think the best thing to do is to have self-discipline rather than just thinking not to become an addict.