.  I'd like to clarify that in order to become truly competitive in the Olympic lifts, you need to do them as often as possible.  However, you can still use the movements to your benefit even doing them only one day a week.  If you mix the lifts in with other lifts, or use them as an accessory, I suggest a variation of them, usually the lifts from the hang or blocks.
--Mike  Mc Kenna