It's very rare I knit anything with more than one colour of yarn. If I don't want plain socks then I use a yarn that has a few colours in it. The method of knitting for this pattern was mosaic which is really easy once you get the hang of it. Instead of hauling both colours around the round of the sock with you lots of slip stitches are used and you just one one colour per row so you don't get that awful pulling or holes when you are going between colours. It's definitely a technique I will try again.
In answer to Carmen who asked a question about the wooden foot shape and whether I knit on it. No I don't. It is called a sock blocker and is used for shaping the sock after knitting it but it is also a good way of photographing my socks without putting them on and getting into odd unnatural positions to get the same sort of shot.