What an awesome topic. Made me think.
In order of "importance", my anti-drugs are:
1. Work (I can't lose my job from Monday absences...also I *like* working, I like the sense of identity and acheivement)
2. Money (intrinsically linked, no. 1, but also stands alone... I have enough money to become a full time, raging junky. But will NEVER become one of those people who spends all their money on drugs ....I still want to afford the new TV, the nights out, the clothes, the holidays. Those things are still important to me. Because of drugs I can't save money as it is, and that worries me sometimes)
3. Self-pride ( my own view of myself as "not" a junkie)
4. Health (I really do care - on some level - about not fucking up my health)
5. Appearence (yeah I'm a little vain, in a good way.... my skin is lovely, want to keep it that way... and don't want to lose weight the cracked out meth-head way, thanks)
6. Family.... is a low consideration but still a consideration. 2 of my cousins have died of heroin overdoses. This has stopped me ever trying it, although I've done a bunch of other stuff... even put a needle in my arm, but without any drugs in it, just out of curiosity. My cousins deaths stopped me asking for drugs in it.
7. Guilt.
8. Being accutely aware of my addictive personality
9. Tolerance.