I finally feel like I've made some progress on the socks! I've gotten the heels turned, and I just finished the gusset decreases. From this point, they should go relatively quickly to the toe decreases, and then I can be done!
I do a pretty basic heel flap - on the right side rows, I slip 1, knit 1 across. On the wrong side rows, I slip 1 and purl across.
When I first started knitting socks, I bought the Vogue Knitting Ultimate Sock Book, and have found it to be very helpful. Granted, I've bought other sock books since then, but this one remains my standby. They have gauge-based templates for both top-down and toe-up socks, and charts of numbers to use in the templates based on your gauge and desired sock size. I've only used it for top-down so far, but I find it to be very user-friendly.
That's all for today - hopefully the next time you see these socks, they're on my husband's feet!