stuck on propagating christmas cactus

twist off a piece 2-3 segments long rather than cutting mid-pad, then leave it on the side for a day or two so the end callouses. push it about a centimetre into barely damp cactus mix and leave it in bright indirect light. the usual mistake is keeping it wet - it rots before it roots. water lightly only when the mix is dry. a gentle tug resisting after a few weeks means it's rooted.