CaseFace has got it down... you need to replace the addiction with other things. Boredom and depression along with loneliness are major contributors to relapse. And the depression isn't physiological... not after the first month or so at least. After the first month of getting clean, the depression is at least 90% mental. And it's caused by not filling your life with other fulfilling activities. Get connected to the community by doing the things you have always wanted to do but never did. Don't be scared and don't be lazy. It's tough in the beginning but once you get started the momentum will carry you through. After awhile heroin will seem pointless and you will actually start to view it as something that would get in the way of your new found happiness. If you find yourself thinking about using in a positive way again, don't let it get to you. Don't fall into your mind's trap of having the thought of using drag you back down. Observe that thought, and that feeling inside of you, know it's there and watch it. Literally watch that thought. And then watch yourself watching it. You will realize that the thought of using is something separate from yourself that you can't let control you. Have you ever heard of the phrase "my mind has a mind of it's own"? Well, that's it. It's your ego saying it needs more, it needs help, it needs something because you are not good enough. Don't listen to it. Your ego telling you those things is bullshit. Like I said, next time it tries to tell you doing drugs might be a good idea, watch that thought, and the feeling/emotions it creates withing you. Your thoughts and emotions are connected like that (if you feel an emotion, it is because of a thought, subconscious or not. If you think a thought, it may be because of an emotion you don't yet recognize, but they are almost never inseparable). Once they (your ego, and the thought and feelings associated with it) see you watching them, at that point you, knowing it's just them... they will go away, because when they know you know they are there, they can't pull their bullshit on you and control you anymore. This will only work when you have those other things going for you though. So occupy yourself with those things you've always wanted to do, be aware of your ego, and the rest will take care of itself. And over time, it will only get easier.