I have learned that YES you should read the WHOLE pattern and make sure that you can visualize it all and understand it before you start to cut anything.
I have learned that YES you need to put in a NEW sewing machine needle after 8 hours of sewing (or sooner).
I have learned that YES, good quality fabric really DOES matter.
I have learned that YES, it matters if I clean and maintain my sewing machine properly.
I have learned that YES, you need to seek out others who quilt. It really does make it much more fun. :)