S turns are fine at height but do you REALLY want to do this below 200ft or so - if you learn to sideslip properly this can be kept up right to the flare if needed, it is also something that can be easily varied to increase/decrease the glide angle - a MUCH better tool IMHO than S turns.
I am also surprised nobody has mentioned "fishtailing", where you just hold your attitude and kick the rudder from side to side. Again not as good as a sideslip, but good to have all you can in the armoury AND you can do it in a Cessna full flap if needed.
