Advice for starting out?

My husband and I are looking into getting our first home. We are also pregnant with baby number two which means we will have two under two. Our son will be a year and a half when our newest addition is born.

What are tips and tricks for saving money when dealing with monthly bills on top two young babies in diapers. My son is formula fed because I never produced milk. Hoping this time works for breast feeding but if not formula is just as good. We already try and use coupons for it as often as possible but other than that what can we do to be smart with a budget?