The 'fuge is a pretty good place, but a lot of pointed sticks thrown at times. Retrievertraining.net is pretty good as well.

I'm not a serious duck hunter, but trained my lab to be decent (in spite of me) with not more than an hour or two a week, a few minutes at a time. No blind triples or anything like that, but good enough to mark doubles and such.

Get Evan Grahm's books and 10-minute Retriever is decent. Where are you located? If you can find a training group to work with, you learn from them as your dog learns as well.

Most labs are smarter than their owners anyway!