I recently completed an excellent short-course for type 2 diabetics (operated by our local Area Health Authority) called "Jugglers". I'm not sure whether it's been rolled out on a national basis, but it might be worth checking with your GP.
The course clearly explained production of glucose by the varying forms of carbohydrate consumption, and how quickly they enter the blood stream:
Slow release: e.g. granary/wholemeal bread, bran flakes, Shredded Wheat, etc)
Medium: e.g. Weetabix, mashed potatoes, white bread
Quick release: e.g. Cakes, biscuits, sweets, sugary cereals, fruit juice.
Instant: Lucozade
For your main meal, carbohydrates should take up about 33-40% of your total food consumption at each meal, along with about 40% vegetables (these do not add to your blood sugars). You should also aim to take in 2-daily proportions of dairy produce (milk, cheese, yoghurt etc) for your calcium intake (again these do not affect your BG). Finally, you should look to consume 3-portions of protein a day (meat, fish, eggs), none of which will affect your BG, unless of course you are a veggie - then you will generally increase your consumption of vegetables and probably nuts/pulsars.
Portion-size is crucial, and this can leave you hungry. So you can fill-up on UNLIMITED amounts of salads and vegetables (except for potatoes). Take care with fruit, no more than 3 - 5 portions a day, and no more than one portion at a time! Beware of fruit juice - the sweetened types should be avoided, and only 125ml of pure fruit juice a day!
Apparently there are 3-levels of readings that you are likely to encounter: 4. 7. 10
Below 4 you will be into hypo, and of course that should be avoided.
You should be aiming for a consistent reading of between 4 and 7.
Up to a couple hours after having a meal, you may achieve readings of up to 10 - beyond that and you're into hyper territory, and again this should be avoided.
The course clearly explained the various forms of medication, when they should be taken, and how the various types assist with dealing with BG and your body's production of insulin and its ability to resist it!
The "Jugglers" course also addressed the perils of the diseases associated with diabetes 2, and the affects of your life-style on the illness: exercise, diet, weight, stress, etc.
I can't recommend the course highly enough. It clearly addressed the misnomas and half-truths, and put all the conflictions you'll inevitably experience, into sharp focus.