So I have knit a lot of socks, and when the first pair I ever knit got a hole, I just tossed them rather than dealing with learning to darn. Then about a month ago, my favorite socks developed a gaping hole in the heel.
I searched the net for advice on fixing socks, and found this blog post by Cookie A herself.
The method involves knitting a patch onto the sock. I had already knit my remnant of the original yarn into a giant sock yarn blanket, so I just used another random bit of yarn.
Cue the Bionic Man opening music, "We can make you better than you were before!"