What are some products some of you mommies got for your babies that were life savers that you'd recommend to a first…

What are some products some of you mommies got for your babies that were life savers that you'd recommend to a first time mom? My SO and I are working on our registry and we're kind of stuck and want to know if there are any items (ex. Carriers, particular bath time products, particular pack n plays, activity centers, etc.) that you guys have sworn by and would recommend to other parents? Thanks in advanced! ❤️