We have two labs

We have a black lab (11 years old) and a chocolate mutt/lab (6 years old). We got both as puppies. My advice:

Don't let them in any room that has carpet until they are potty trained. We have hardwoods, and took up all the rugs until they were trained. Once they go on the rug, it's hard to get them to stop doing it since they can smell where they went before even after you clean.

As others have said, lab puppies like to chew. Our older lab chewed anything and everything, and used to want to chew/bite our then young children too. They have sharp little baby teeth, and those bites hurt (although they won't cause any serious damage). Be sure to have lots of things around they are allowed to chew on, and substitute an allowed item any time the pup tried to chew something not allowed. Men's white socks tied in a knot were favorites for ours. You can also wet a knotted washcloth then put it in the freezer. The frozen cloth helps soothe the puppies gums while they're teething.

Our dogs both hated the crate, so we gave up on the crate training pretty early. Crates are great, though, if your dog will learn to accept it. If not, what we did is just baby gate the pups into an area of the house (in our case the kitchen) where they could do little harm.

You will need to take an 8 week old puppy out literally every hour or two while he/she is awake to go potty. As others have mentioned, you need to stay out with the pup and give lots of excited praise and a treat every time they actually go potty outside until the pup gets the hang of it.

Lab puppies are the cutest animals in the world, and they are lots of fun, but lots of work too. Once they get older, they are the absolute best dogs. Ours have the run of the house, and are wonderful companions. Enjoy, and please share pictures!