I nursed my DS for two years. I eat better if I act as my own sous chef one day a week.
My crib sheet to healthier eating:
-Once a week prep or make and store several servings of a protein, various vegetables, and a whole grain.
-Replacing fats like mayonnaise or vegetable oil with avocado or homemade hummus. Works great on sandwiches and in cold protein salads.
-Keep yogurt and fruit on hand for easy snacks.
-Avoid boxed meals and shop the perimeter of the grocery store.
-Organic is good, whole, unprocessed foods are better.
On Sundays I usually make I crock pot of homemade pinto beans, black beans, or lentils (seasoned) and a 10-12 servings of a whole grain like red quinoa seasoned with salt, pepper, onion and garlic. I also chop vegetables and fruits for the week and put them in Debbie Meyer GreenBags (then they'll stay fresh all week). I'm a vegetarian, but I usualy roast a small organic chicken for my kids, and then make stock from the bones.
All that prep so that through the week I have to mostly just assemble to come up with good quick meals.
For breakfast on many days I'll have quinoa with beans and an egg sunny side up with Mexican hot sauce and whatever veggies I have on hand. Other times I'll have a corn tortilla with beans, spinach and a slice of cheese melted under the broiler. I also make soup by sautéing noodles and veggies with lentils in olive oil then adding vegetable stock and a little cream and curry powder. Making a quiche can be a few days of breakfast or lunch as well, and it's easy to add lots of veggies.
ETA: Oatmeal, dark beer and nutritional yeast are all said to be good for your milk supply.