This article is from the Recreational Figure Skating FAQ, by Karen Bryden with numerous contributions by others.
The Waltz jump is done on the arc of a circle starting from a LFO edge
and landing on the RBO edge, with one half rotation. Here are some
-- Posture. You can't possibly do a Waltz jump if your body is leaning
forward from the waist. You must stand upright over your skating leg
and your knees should be bent.
-- The biggest mistake most beginners make in the waltz jump is that
they think that all the rotation is in the air. A waltz jump is really
a side-to-side jump. You actually take off with your left foot like
this | and land with your right foot like this | . THE LAST THING TO
LEAVE THE GROUND IS YOUR LEFT TOEPICK. THE FIRST THING TO TOUCH THE
GROUND IS YOUR RIGHT TOE PICK. The force of the landing and your free
foot coming back complete the rotation.
-- Since you glide on your RBO edge after landing, practice gliding on
this edge. Get your coach to show you what a correct landing position
looks and feels like (arms below shoulder height, and slightly ahead
of your body so that you can see both hands out of the corners of your
eyes, your left leg extended out behind you, head up). Work really
hard to memorize that feeling while gliding on your RBO edge. This
landing position is the same for almost all the jumps.
-- The sequence of the jump is a down-up-down movement. Down to
prepare for the jump, up to jump, and down on your landing leg.
-- Stand holding the rink barrier and put your hands on the boards to
steady your self. Try just making little hops from your left foot to
your right foot just to get the feel of having both feet in the air at
the same time. Don't worry too much about take off position or landing
position to start with. Just get the feel of shifting your weight from
the left side to the right side.
-- OK, got all that? Now try doing it away from the wall. Don't worry
if you can't get as high or far when you first leave the wall. It's a
little scary at first. But with practice, you'll have really nice
waltz jumps that you can do from some speed that will be even bigger
than anything you can do on the wall. Generally some speed will make
the whole take off and landing more predictable.
-- Don't look down. The ice will be there when you need it whether you
look or not.
-- Swing your free leg forward at the beginning of the jump. Because
you are on a curve, this will feel like jumping outside the curve.
Think of this as jumping OUT or AHEAD, but don't let yourself think of
it as jumping AROUND.
-- If you jump straight ahead, and if you were on a FO edge when you
took off, your body WILL do the required half revolution all by
itself, so that when you land, you will be going backward.
-- When you land, you should roll off your toepick onto an RBO edge.
Landing on the flat of the blade will make you skid.