Advice? Tutorials for selling online

[bluefantasyz.livejournal.com]

So I had a friend who said she liked to read up on any tutorials helping artists sell their art online, through auctions, commissions, etc.  Unfortunately, she didn't have any links on hand.  I definitely consider myself an amatuer bussinessperson, so I am really interested in these types of tutorials.  I would love to make myself more professional when it comes to the business side of art.  I am doing some internet searches, but what I am looking for from you are any links you happen to have tucked away that may help me out.  Some of the best things never show up in a Yahoo search!  It's much appreciated by me, and I'm sure will be by others as well!  Please do share!  Thanks!!