go to this website.
In "Training Textbooks" You'll find a lot of literature about raising puppies.
I have two Labradors at home, and they destructed just so much of our furniture, and so many shoes, I have lost count.
Puppies use chewing for several things: Teething, exploring their environment (just like human infants), and sadly sometimes for entertainment. You should make sure that they burn off all their energy, and direct it to things that are okay to chew.
If you can get a kong, nothing like it. You can find out how to use a kong at the website I mentioned above.
Most of all you need patience with the puppy.
Do go through this site, it's loaded with information!
I am in no way related to the site, and all the information available is free, and I benefit only from the knowledge I get from there and I hope you do too.