The following link is something I refer to now and then. I also tell a lot of people looking for advice to check this site out. It is a collection of articles that cover pretty much any aspect of audio production.
www.theprojectstudiohandbook.comOther links that I check on regularly:
www.audioforums.comwww.digidesign.com (the company that makes ProTools)
www.sweetwater.com (this is an online retail comapany, but it's a good way to learn what's out there for gear)
MR. H