I have a couple rules I try to make myself follow. These would be...
1. Never take more than what I'm prescribed. Running out of Ativan, especially when I'm having a legitimate episode, is the worst thing in the world. I don't have $500 for an emergency room visit, especially so they can just give me a fucking ativan. So I don't let myself abuse my Ativan prescription, at least I only do on a rare occasion.
2. Alcohol isn't for sleep. As sleepy as it makes you, and as much as I wish I was, it's not for sleep. I cannot drink if I'm going to be going to bed, it will keep me up. Same applies to Weed.
3. Don't source drugs. Fortunately, I have most everything I want prescribed to me. I have Vyvanse for the day, and Ambien for the night. That's all I need. Anything more is going to give me problems. Therefore, I don't ever try to source anything other than weed. Weed is the only thing I have a dealer for and even then, I don't smoke weed that often. Maybe once every 3 months or so. Otherwise, anything else I get was prescribed to me, or I got it for free.
Unfortunately, I've mastered the ad of lying and can spot a liar, and lie myself, without any hesitation. I actually trained myself to look for subconscious signals people give to let me know they're lying and I've trained myself to not do any of these when doing so.
Because of this, I can actually make myself believe a lie. Pretty fucked up, right?