I voted for the Internet and Books. When I first started out, there was a guy named Brad at my LFS. I thought he was their employee but he wasn't....they just allowed him to hang around because he would answer questions and tell you what you needed to buy. He had his own aquarium maintenance company and he was always pushing to sign up a maintenance contract. I relied on him for everything and it turned out, he was purposely screwing up my tank so I would have to pay him to fix it. However, I didn't realize this until I did my own research with books and the Internet.