Agree with Mike, a good book or three read cover to cover is the best thing a person new to the hobby can do to have a solid foundation of knowledge from which to ask questions and understand the answers given. There are a lot of crazy things recommended by folks on the net and a lot of difference of opinion on things that dont have a definite answer. So I, personally, would not recommend anyone lauching out in the hobby without a good overall understanding that can be best gained from a good book. The learning never ends though and no book can have everything you need, so after you digest the basics you can then look for specifics via forum sites like this and collections of articles like wetwebmedia.com. I am rather partial to the works of Fenner and Calfo. Conciencious marine aquarist, Natural marine aquarist: invert, and coral propagation book by Calfo.