When diagnosed T2 my fasting blood glucose level was 13.1. Five weeks later it had dropped to 9.8. Gradually it dropped further to 8, 7 and is now after 4 months it is around 6.2. I did this by firstly dropping all the food with lots of sugar in it (breakfast cereals, orange juice) and then reducing foods with a lot of carbohydrates (bread, potatoes, rice, pasta etc).
This has also allowed me to reduce a lot of weight (7Kg). If you change your diet then good things will happen and quite quickly too.