I order all my thread here. And some fabric. There clearance fabric is great for backing fabric. I've found some as little as 2.50 a yard. Thread for 1.79. And shipping is free if you spend $50.
http://www.connectingthreads.com/Quilting.cfm
I love all the designer fabric here. They have a great search engine and really save me time when I'm looking for something in specific. And shipping is free if you spend $35. And they have an awesome after Christmas sale.
http://www.fabric.com/
This is my go to spot for novelty fabric and pre-cuts. And they have a great selection of sale fabric.
http://www.equilter.com/
This is a great place for pre-cuts at a great price. Quality fabric.
http://www.anniescatalog.com/
I buy all my quilt books from amazon. Usually second hand. And, you can resell a book back or donate to your local library.
Hope you get a good response. Can't wait to see where else is a good place to order from and why.