Library

Before breeding our first Lundehund litter, I read a lot about dog breeding, genetics, anatomy and the breed standard of the Lundehund. I used the internet for researching, but I've also read some books. Some of these books or videos are a great source:

Lundehundboka - Ingvild Espelien;
Born to Win, Breed to Succeed - Patricia Craige;
An Eye for a Dog - Robert W. Cole;
Puppy Puzzle, The Hastings approach to evaluating the structural quality of puppies;
De Geboorte bij de Hond en zijn Wilde Verwanten - C. Naaktgeboren;
Puppy Culture
Dogs In Motion (incl. DVD) - Martin S. Fischer & Karin E. Lilje;
Control of Canine Genetic Diseases - George A. Padgett Page;
Natural Rearing: Breeding & Raising Dogs The Way Nature Intended - Dr. Jeannie (Jeanette) Thomason;
Early Neurological Stimulation - Carmen L. Battaglia (opens in PDF)

Besides that I have several diplomas and follow courses/seminars regurally.

Diplomas

KK1 (Cynological Knowledge)
Animal Care
Dog Show Ring Steward

Certificates

I've attended several AKC judges' breed seminars and received a certificate for them, here is a list of breed seminars I attended. I think it's important to learn about other breeds too, not only your own breed.

Australian Cattle Dog
Australian Shepherd
Bergamasco
Berger Picard
Bernese Mountain Dog
Biewer Terrier
Black and Tan Coonhound
Black Russian Terrier
Brussels Griffon
Chesapeake Bay Retriever
Chinese Shar-Pei
Chow Chow
Dandie Dinmont Terrier
Doberman
German Shepherd
German Shorthaired Pointer
Harrier
Irish Wolfhound
Italian Greyhound
Kerry Blue Terrier
Newfoundland
Norfolk Terrier
Norwich Terrier
Poodle
Shih Tzu
Rhodesian Ridgeback
Vizsla

Courses/seminars

KK2 (no diploma yet, but planning to do the tests soon)
Genetics of Coat Color and Traits by Good Breeder Center & Paw Print Genetics
CKC Breeder education
Kennis Tour Online - Keuzes in de fokkerij (Knowledge Tour Online - Choices in Breeding)
Workshop Showing: Dots on the I by Kynospirit
Embark Canine Health Summit