I used the Universal Toe-Up Sock Formula Knitty pattern (Ravelry link here), which I highly recommend, especially if you have irregular-sized feet (mine are quite wide). You measure your feet first and then plug the numbers into the pattern to make custom-sized socks especially for you! The toe-up method (using a crochet/provisional cast-on) means you can try them on as you go to ensure that they really are going to fit. For the cast-off at the top I used a stretchy sewn cast-off method that was recommended on Ravelry. It is from Elizabeth Zimmerman's Knitters Almanac and there is a video here showing how to do it. Very useful bind-off for areas where you need stretch, like the ends of sleeves or tops of socks.
