Good advice from everyone. Definitely do not force or make strong corrections at this point. Teaching should always be done in a positive manner. I would also recommend you get a hold of some puppy training material. I used Bill Hillmann "Training a Retriever Puppy" but Sound Beginnings is also very good.
Pat Nolan has another very good resource to get you started. It's probably not the most organized resource but it's very good and it's FREE!