http://www.al-anon.org/
There's a reason it's a classic
I never knew my father but when I was 5 he committed suicide while high- I posted on DA's thread about OD's that Al-Anon and therapy are what helped me get where I am now
Despite such an early example of the dangers of drugs- I still managed to develop a coke addiction in my early 20's- My Mom felt that such a stellar example of "What not to do" would be enough- we talked about drugs and alcohol in passing but it was never a major "LOOK OUT OR THIS WILL BE YOU" talk- I think involvement w/Al-Anon or Al-Ateen would have been a huge buffer between me and that path had I become involved sooner
As it is - I took the hard route and luckily lived to tell the tale I know addiction will always be a discussion in my home b/c my children will have a higher genetic tendency to follow my footprints- I hope to show them the many other paths they have to choose from BEFORE they have to backtrack