On the left is a pair of toe-up Jitterbug socks. Here I tried Charlene Schurch's reverse heel flap. I should have started about an inch sooner-- right where the arch begins.
On the right is a pair of house/slipper socks. I knit the soles first with a dk/worsted handspun on US 3s, then I knit the instep from the toe and attached the sides as I went with another hanspun yarn on US 2s. Since the yarn was from my second & third week of spinning, it was a lumpy/bumpy knitting experience! They're incredibly warm, and great to wear in the winter on hardwood floors.