Breakfast

Breakfast is the most important meal when starting a day. After eating breakfast blood sugar levels should be in control as it is the first meal. Avoid drinking milk/yoghurt/fruits in the morning. I eat omelet made with an egg, onions, and cheese in the morning along with some hot sauce. Then I eat bagel thins, which are less in carbohydrates, with cream cheese and salad greens. Sometimes I eat Indian common breakfast like idli, dosa, chapathi, upma etc. along with an egg. I always make dosa with brown rice which has lot of fiber and helps control sugar level. It is very important to control portion size. I usually eat 2 dosas along with peanut chutney. Try to avoid coconut chutney as it has carbs. Peanut is a protein so it helps maintain sugar levels. I make upma with 1/3C ravva (1/3 has 30g carb, I read it on the upma ravva packet label). I make soy idlis as soy beans are rich in protein and I eat 4 small sized idlis with peanut chutney. I eat 2 chapathis along with some curry.
While choosing cheese it is very important to select fat free or reduced fat.
If possible do some 15 mins walking after each meal.

Note:
This is what I follow, in my pregnancy based on my doctor, and nutritionist advice.
For individuals it may vary. Talk to your doctor first.