This will be short and sweet. Shortly after I was diagnosed I was taught how to read labels and adjust my insulin dosage. I was taught to add up the total amount of carbohydrate in my meal and calculate the insulin I needed based on a ratio. I was also taught to adjust the insulin dosage if m BG was too high or too low.
It was a bit tough at first. I often adjusted in the wrong direction and nutritional information wasn't always available. I bought myself the Calorie King book and software and started learning what a cup of rice looked like and how many carbs were involved.
I learned that ( for me ) one unit of Novolog would reduce my BG by 30. I learned that I needed one unit of Novolog for every 10 grams of carbohydrate. I learned not to use that ratio if my pre-prandial BG was below 70.
I've become quite accomplished at managing my BG and keeping things within the desired range. Kudos to me on my accomplishment.