Start thinking of food as your #1 drug. Food choices helped get you to where you are, and they can help you get to where you want to be too.
When I follow the GI (Glycemic Index) closely, my blood sugars are quite good.
Portion control is huge too.
I try to limit the starchy foods like bread, breakfast cereal, rice and pasta, and rather focus more on lean proteins, vegetables and fruit. If I do have cereal (oatmeal) for breakfast, I add a tablespoon or so of chopped almonds to balance it out with some protein so that my blood sugar doesn't spike.
I try to add veggies to every meal, even breakfast. I buy egg whites in the carton and make a spinach & mushroom omelet, sprinkled with a bit of grated cheese or feta. Wrap it in a warmed small whole wheat tortilla - it's so yummy!
Salads for lunch, with a splash of lemon juice instead of dressing, and again with some protein (cheese, chopped hard boiled egg, leftover chicken).
There are times when I splurge, but I pay for it in several ways (high sugars, headaches, diarrhea), so I'm learning all the time too.
If you can find one locally, a lot of community centres offer diabetic education classes for people who are either newly diagnosed or haven't been able to control their diabetes with diet and/or exercise. They're great programs and really help you understand the disease.
One thing I really need to work on is exercise. I hate it so much. I've never been good at sports and got a lot of ridicule growing up because of it. I used to try to exercise at home, until the day that Mr Scully walked in on me "Sweatin' to the Oldies" in front of the TV and laughed his ass off at me. That was the end of that.