American Dog Trainers' Network site offers up several thorough articles on topics ranging from curbing aggression in dogs, to selecting a dog trainer, to realistic tips for training Rex.

CNN: Site-Seer: Fetching an obedient dog from the Web

We could record short training tips and include them as part of our emails.

FORBES: Talk Really Can Be Cheap

The site deals more with curbing specific bad behaviors, such as excessive barking or chasing cats, than actual training tips.

CNN: Site-Seer: Fetching an obedient dog from the Web