Look for some chop with a ramp conducive for an off-wind jump. Approach the ramp with maximum speed. Speed is your friend. Bend your knees to harness as much energy as you can for the jump.
Jump off the wind by springing off the chop. Imagine all your internal energy going up and down wind. You want to pop off the chop like a wake-boarder.
Lean slightly back in you harness lines, point the nose of the board down wind, and let go of the front hand.
Extend the arm back and bring your knees up to the boom and the tail of the board under your bum. Really feel the stretch in the extension.
Keep the extension even during the decent of the board. Stay relaxed a feel the float.
Guide the nose of the board with the front foot. This facilitates a smooth and soft landing.
Begin to reach back for the boom.
The torso of the body and the mast remain parallel during flight. In other words you gain your stability and control in this move by having a good connection to the sail that comes through your stomach via your harness lines.
Extend you legs slightly to meet the water.
Grab you boom before or after the landing. The best landing is on the nose and you feel no impact.
Because you're hooked in, the rig is trimmed, and so you are planing when you meet the water, as if there was not transition from air to water.