When I was having my lesson on Saturday, Lucy mentioned that she had taught a couple of people who were legally blind, and that they were taught as if they couldn't see all of the twist in the yarn. This morning when I spent a few minutes spinning, I figured I would try using my fingers as my primary method of determining whether or not to continue park and draft or if I should spin the spindle again. With the exception of a couple of times when my impatience resulted in either very slubby or very thin areas (because unintentional thick and thin is super easy), this was much easier to follow. When there is plenty of twist left for the yarn to grow into, the yarn right around the hook feels like little pebbles on a string (actually it is everywhere, but it felt like it left the area above the hook last).
I did about 30 minutes of spinning before going back to my knitting.
I'll probably knit up my little bit of superwash from the weekend. When I was starting it, I twisted it in the wrong direction and it will be a bit irritating to remember to spin the entire thing counter clockwise. Instead, swatch!