Does this sound familiar? It will if your Lab is under about 3 years old. But there is hope......
Labs have been bred for decades as working dogs. They need lots of exercise, but most of all they need to be part of your "family pack." Most, if not all, behavior problems stem from the dog's insecurity within this pack. There is one fantastic source of dog behavior information that has literally been a lifesaver to many Labs, and it is a unique group of monks in upstate New York: The Monks of New Skete.
The monks vocation is breeding and training dogs. They have developed an uncanny sense of canine instincts, and have used these to train (or re-train) many "problem" animals over many years. I have given these two books to "new" Lab owners, and they all have had excellent results from the insights and techniques within:
Click on the jackets for more information!

Additionally, they have an excellent video that beautifully illustrates their techniques:
Click on the box for a description.

This
is a good, general reference for the history of the breed, and
the top kennels of the world. Also, a good section on raising
and training.
Barron's complete
owner's handbook. Inexpensive, and a good companion to the New
Skete series.