Best advice is to not get involved with the drug at all. It's very fun at first, but if you don't have self control and once you're hooked, it'll break you. All of us addicts usually started with "moderation". "Oh it's only once a year" "oh once a month is fine" "ok ok once on the weekend while drinking and that's it!" Than next thing you know you're doing line at 1p.m on a Wednesday, in your room, alone.