Fear that borders on paranoia is my ally as far as illegal drugs go. I was a heavy user in my youth, but once I got out of tech school and was working in a job that I could lose if I were busted I was a lot more careful and used them more infrequently. When I married and started a family, I stopped completely, not because I saw the light and made myself a better person but out of fear. I still jones for pot and psychedelics. My recent troubles were with alcohol and prescribed drugs (opioids and adderall). It crushed me to come clean with my family but again with the fear - I was afraid I would lose them if I kept lying about it.