My addiction comes into play with a new game I get obsessed with it until I beat it, and then usually I don't play it again unless it's a really good one.
I limit my gaming by staying away from the online massive multi-player games that are designed specifically to be addictive and immerse you into an imaginary world with hours, on hours, on hours, of progressive gameplay and then you still do not in most cases actually finish the game!
At least a single player game will in most cases eventually come to an end, then if you replay it that's your choice and your problem.
Take a break, go outside, look around, find something productive to do, build something, grow something, feed something, do something other than gaming, there is much more to life!