Training
We have all met well-behaved Labs in addition to the out-of-control variety. Training, or lack thereof, influence whether we want to be around that Lab. 
Rescue Labs, while typically kind, loving, and eager to please, usually have not had the benefit of much training or socialization. Our adopting families are special because they understand these needs and offer a Rescue Lab the chance to become a fine family member. Training is an investment for a good future together and helps develop a bond between you and your Lab.
Consistent, structured training is a must if you want a Lab who is a joy to have as a family member. No matter how old your Lab is, you can both benefit from taking a class. The best way to teach YOU and YOUR LAB the skills is at a class taught by a reputable instructor.
Even the most seasoned Lab owners go to training classes when they acquire a new Lab because they know the guidance, support, and socialization (to other dogs and people) in class is an investment that pays high dividends.
How to find a trainer
The Association of Pet Dog trainers (APDT) for a list of trainers in your area.
The Association of Pet Dog Trainers (APDT) and Labrador Retriever Rescue, Inc. do not endorse or recommend any of the trainers listed.
You should interview and research the trainers. Ask for recommendations from your vet's office or fellow dog owners. Ask to visit a class (without your dog) to observe the instructor's teaching style.