I'm quite fond of the Eye of Partridge stitch when making heels in variegated yarn, as you can see here (click the photo to see a larger image):
In case you don't want to skip to last week's blog entries to find out what yarn this is, it is KnitPick.com's Sock Memories, in Rocky Mountain Dusk. This 100% merino yarn is quite lovely to feel as the fabric grows in your hand. The socks themselves are very comfortable. They are shorter than I usually make my socks, but there was also a little less yarn (195 yds to the 50 gm hank) than I'm used to. I could (and shall next time, when I use KP's Yukon or Red Wood Forest) make them an inch or so longer.
Now, I just have to wait for temperatures to fall below scorching to give these socks their first outing!