Spent some time this weekend organizing my pattern files, and came across an article from the Fall 2002 issue of Spin Off about sock knitting. They offer some useful sock tips.
1. Give heels and toes of socks longer life by working a strand of sewing thread with the knitting yarn while working the heel flap, turning the heel and working the toe shaping.
2. To tighting the join between the heel flap and gusset, pick up stitches through the back loop of the chain edge stitches. (this assumes you have slipped the first stitch of every row in the heel flap).
3. To avoid the annoying gap between the heel flap and instep stitches pick up an extra stitch at the base of each gusset (between the heel flap and instep stitches). Work these stitches together with the edge instep stitches on the next row.
I believe this is an excerpt from The Knitter's Handy Book of Patterns by Ann Budd.
The heel on sock one is turned, and I'm working the gussets. It's downhill from here!