Welcome and congrats on your new puppy!
First I would start researching trainers in your area for a good Puppy Socialization class. Then talk to your breeder about things he/she recommends specific to her puppies.
Here is a list of items:
NEW PUPPY ITEMS
In no particular order:
THINGS TO BUY
-Crate (typically a Large 42 inch size for a labrador - get one with a divider)
-Nature's Miracle
-Baby Kong, then graduate to the large black Kong
-Toys
-Chew things
-Collar
-Leash
-Poop bags for while you are out
-Pooper scooper for while you are at home
-Bowls for food and water (stainless steel or ceramic)
-Food (stick to what your breeder is feeding at least until adult teeth come in)
-An air tight container for storing kibble (keep your bags in case of recalls)
-Some type of bed or crate mat to introduce once you feel your puppy is safe to not chew or urinate on it
-Towels for clean up
-A lix it water dispenser for the crate
-Baby gates and/or an ex pen
-Nail clippers and/or dremel
-Ear wash and eye wash if needed
-Zoom Groom and brushes
-Training treats
-A blanket or toy to leave with your breeder to bring home later
-A blanket or mat to teach a spot to settle or wait
-Books about preparing for and training your puppy,
I like Ian Dunbar's After You Get Your Puppy, he also has a website
I know there are several others people can chime in with...
THINGS TO DO
-Be sure to schedule an appointment with your vet right away to establish a relationship and do a wellness check
-Do some research to find a good puppy socialization class to get enrolled in
-Make sure you budget and prepare financially for your pup and these items, and don't forget about vet visits, vaccinations, flea/tick and heartworm meds, spay/neuter and unforeseen accidents or health issues
-Consider enrolling your puppy in some type of pet insurance
-Remember to microchip your pup and if applicable, register your puppy with the AKC if your breeder does not do these things for you
MORE THINGS TO DO
-Puppy proof your house by picking up and putting away anything valuable to you, any chemicals and household cleaners, poisonous plants or other hazards
-Learn how to properly housetrain, potty train, crate train and socialize your puppy so you are ready to do these things once you bring puppy home
THINGS YOU CAN'T BUY BUT WILL NEED:
-Patience
-A sense of humor
-Dedication
-Love