Yes, I agree with you on the breast feeding part. It can totally reduce the weight gained during pregnancy. Also, eating nutrient rich food is a nice way to shed extra pounds without compromising health especially if you are breastfeeding. Increase in greens and fruits can also help.

We all know that while being pregnant, we gain weight 2x or more than we least expect it..   
But we should worry on it..we can lose weight if we are determined to do it..   
As my doctor says, breastfeeding can help you loose weight, but should not depend on it.   

We don't need pressure to ourselves by over doing it..we should take it one step at a time.   
Weigh first: find your preferred target weight to lose. You could check weekly or monthly. Have a notebook ready for your weight loss achievement.   
Go eat a healthy diet (fruits, vegetables, oats) and drink plenty of water (try lemon water).   
Eat smaller but frequent meals.   
If you will eat carbohydrated (starchy) foods, take it 30 minutes before you do strenuous exercise.   
Do mini workout for 10 minutes while the baby naps or you could have a stroll in the park with your baby (walking is good form of exercise too!)   
Watch also your calorie intake.