"Living With a Diabetic"- help!

My wife is leading an upcoming diabetes support group. We are planning on addressing this topic...Living With a Diabetic. She was diagnosed Type I 12 years ago. I would say it has definitely been a mutual journey as one expects with the arrival of any serious life-changing disease. My "contributions'' have not always been supportive or appreciated, but I would like to think I have "been there" for her as well. We continue to improve our learning curves and have a very good life together. Perhaps you who are living with your 'diabetic' would like to share a 'gem' from your experience. Diabetics? What did we do right? (and not so right?) What is important to mention when thinking of the one who is living with a diabetic?