I quit illegal drugs. Simple but not easy as stated above, booze, came next, ditto on the simple not...
Almost 16 years totally clean and mostly sober (2 lapses).
Smokes?? Very harmful to those around me for me to try and quit. If you smell anything like tobacco I will set you on fire and try to smoke you during these times. And thats one of the nicer things I do
No success yet, but each try I go a little bit longer and learn a few things about myself and tobacco which help the next time.
Keep trying and one of these times you will surprise yourself. My current practice is to try and do something else first (anything) each time I find myself reaching for a smoke. Every few minute delay means a little bit of progress. This has gotten be just below 2 packs a day from 3+.