dog training

Question
Who are some famous experts on dog training? What are some good training tips?

Answer
What specific areas of dog training are you inquiring about?
There are many areas of training available and each has it's respected experts and suggestions that are dependent on the field. Here is a small example:

Competitive Obedience
Companion Behavioral Training
Personal Protection
Agility
Herding
Hunting
Lure Coursing
Flyball
Freestyle Dance
Guide/Service Dog Trainers
US Customs and Military Dog Training
Search and Rescue