I cake my yarn (make 2 center pull balls) and then put them in small project bags (or ziplock style plastic bag works too!)
keep one on my left and one on my right... flip the yarn when I flip my work so the left sock's yarn is always on the left side, right sock's yarn is always on the right side.
takes an extra 2 seconds with ever turn of the needles, but prevents tangles which can take a lot longer to fix!
I also do my socks toe up, so when I put my project down (once big enough) i shove the yarn leading to each sock into the sock itself!
I'm Amy... AC1OZ