One thing I love to discuss is how to live minimally with a baby! We live in a 700 sq foot apartment (we moved in two weeks before my due date, and were desperate to take anything at that point), so we do not have room for excess and I love what it has taught me! Here are some tips I've found to be helpful:
Plan ahead: What do you need for the first six months? What to ask for from family for holidays (because they will ask!), get things that grow with your child or are multi purpose, and to save some money ask a friend for hand-me-downs, it saves you money, gives your friend some cash!
I hate the word "essential" when it comes to purchases, but here are some things we have found helpful so far!