I make socks from worsted weight to use as 'house socks'...ie not usually worn with shoes around the house, but nice and thick and soft and warm.
You just adjust the pattern. I'm a guy, so my dimensions are probably a bit larger, but I usually cast on about 50-55 sts and work from there. Nice thing about working with worsted is that the socks knit up MUCH faster!!
Silver's sock tutorial has adjusted pattern directions for worsted weight yarn. I also recommend the sock books by Charlene Schurch.