Figure out what works best for you. I feel like I have enough laundry to do to begin with, so I don't prewash. I use a dry iron (because I kept getting burned). I sometimes use spray starch/Best Pressed (it's a memory thing with me). Since I use Elmer's to sandwich, I wash all quilts once they are completely finished and throw a Color Catcher in there (ANOTHER thing that I wish I had invented!). Try not to overthink it or you won't be able to get anything accomplished. I've yet to have the Quilt Police storm my house to tell my I'm doing something wrong.