When you go gambling, only bring enough money with you. Bring only those that you plan to play. Leave those plastic ATM cards at home to avoid temptation of withdrawing from machines and if online make sure its out of reach. Also leave those credit cards too, sometimes we are tempted to use the cash advance function.
It is good idea to limit yourself, but the best thing is being able to control yourself during the gambling.
Yeah, limiting yourself and having some sort of self-control are the major things that would actually help a whole lot when it comes to gambling. Anyone who cannot imbibe these major attributes will always find it hard to even realize when they have had enough, let alone, knowing when to declare to themselves enough is enough.
People who are able to control themselves, are those who just gamble for fun and never really expected much from gambling, but those who think it is an avenue for them to get rich, that mentality is something that would keep driving them to where they should not go.