For Family Members

The following resources do a great job of offering information and/or help for family members of those addicted to substances. You can also find information and support if your family member has been diagnosed with the dual diagnosis of addiction and mental health disorder.
Some highlights from this page:
Supporting a Partner Without Enabling
Checklist for a Recovery-Friendly Home
Guide for Families
Guide for Parents of Addicted Children and Teens
Guide for Children of Addicted Parents
Some highlights from this page:
In addition to this article, you can scroll down and find links to related articles, such as “7 Signs That You’re Enabling an Addict,” “Adapting to the Reality That Your Loved One Is Addicted,” and “Common Excuses People Make When They’re Addicted.” 
From this blog page, you can find articles such as “The Truth About Tough Love” and “Addiction Is a Family Disease.”

Al-Anon Family Groups— 
Some highlights from this site:
How Can I Help My… (under Newcomers)
Find Out If Al-Anon/Alateen Can Help (under Newcomers)
Includes a 20-item Adult Quiz and a 5-item Teen Quiz
FAQ (under Newcomers)

Nar-Anon Family Groups—
Some highlights from this site:
What’s Nar-Anon? (under Newcomers)
Our Principles (under Newcomers)
Find a Meeting

Adult Children of Alcoholics—
The Program is for anyone who grew up in a dysfunctional home.
Some highlights from this site:
The Laundry List—The 14 Traits of an Adult Child
Problem (under Quick Links)
Solution (under Quick Links)
Am I an Adult Child? (under Newcomer)

What to Do If Your Adult Friend or Loved One Has a Problem with Drugs (a screening tool)—

For families of those with dual diagnosis
NAMI Family & Friends is a free 90-minute or four-hour seminar that informs people who have loved ones with a mental health condition how to best support them. It is also an opportunity to meet other people in similar situations and gain community support.