Diet and exercise. Exercise and diet. Diet and exercise. Exercise and diet.
I have an excellent relationship with my doctor. He referred me to a study being done by the Mass. General Hospital and Harvard Medical School. It's a diet study to see what rule, if any, group dynamics play in weight loss.
Anyway, the key components are limiting calories and fat. They don't dwell on carbohydrates per se, but we do spend some time talking about "good" versus "bad" carbs in the context of calories and fat.
We also spend a lot of time talking about exercise. Since I work out about an hour a day 6-7 days a week, I'm ahead of the rest of the group in that regard. You don't need to do that much, but the recommendation is for 170 minutes per week of exercise.
I started on the diet in April and as of last week, I've lost 27 pounds. My A1C went from 6.7 to 5.5. My BP has dropped, my cholesterol numbers have improved.
My eye doctor is also a great guy. I saw him in August and he did the usual "diabetic eye exam." All is well. Retina is fine, start of a cataract, but he says it will be several years before it needs attention. OTOH, my wife just had both eyes done and she isn't a diabetic.
One of the things we do in the study is count calories and grams of fat. During the weight loss phase, I at 1,200-1,500 calories a day, although I was usually around 1,100. I was at 40 grams of fat a day, but usually was around 25-30. Now, I can eat a bit more, but I'm still below my allowance most days.
When I started the study, I was skeptical that I'd be able to get my A1C below six, but the coordinator told me that I'd be able to do that if I kept on the program.
My mother died from complications of Diabetes, but never had eye problems.
I could go on about this, but it really does come down to "diet and exercise."