I don't know of a specific link but there are allot of great books out there. Are you just starting the program for the first time or do you have previous experience?
This is the link for the AutoDesk discussion forums. Do a search for specific questions you have before asking. Chances are it's already been asked more than once!
Also, if the moderators here don't mind post them here. Time permitting I will answer and I am sure Scott35 and a few others can too.
