See below for tips related to the creation of art as well as the business side of things. When creating art, always follow appropriate safety measures.
Favorite Ceramic Stores
I love Coyote Clay for their clays and glazes. They have friendly and helpful customer service.
The Ceramic Store offers a wide selection as well as helpful hints.
http://www.ceramicstoreinc.com/
Xiem offers fun tools that make throwing easier.
http://www.xiemclaycenter.com/
Big Ceramic Store is a great place for just about anything.
Raku
If you want to build a raku kiln, check out this book. It has detailed directions on building the kiln as well as a clear crackle raku glaze recipe.
http://books.google.com/books/about/Alternative_Kilns_Firing_Techniques.html?id=eMeEnoQ4shgC
If I had not had the abilty to build a kiln, I think I would have bought this kit.
Kiln Vent
You should have a vent system on your electric kiln not only for safety but also for the longevity of your kiln sitter. This website has a fantastic guide to helping you build a down draft vent for an electric kiln.
http://cone6pots.ning.com/page/doityourself-kiln-power-vent
Skutt also sells a vent system.
Sink Waste
In order to prevent ceramic waste from going down the drain, here is an easy to install product.
Safety
Your health is valuable. Be safe. This is a great resource for understanding some of the potential hazards when creating art.
http://books.google.com/books/about/The_Artist_s_Complete_Health_and_Safety.html?id=E7-9unTgJrwC
Business Help
For business startup, I started with Legal Zoom.
This wonderful website is hosted by 1&1.