Lock.

1. First make sure you can spin a buttered 360 or a 180 cleanly.

   This is a trick about stopping mid-rotation, so if the spin itself is shaky you'll fall the moment you try to lock.

2. Before you start, decide where you'll stop.

   For example, for a nose-press lock (weight on the front foot) the board points straight across at 90°; for a tail press it's 180°. Lock the stopping angle and the pose you'll hold there into your head as a pair.

3. As you begin spinning, turn your upper body (chest and shoulders) first.

   Look slightly ahead in the direction of the spin and let your shoulder line lead so your torso winds up against your hips.

4. Just before the angle you want, stop your upper body and let your hips and board catch up to it.

   Your hips brace against the already-stopped shoulders in the opposite direction, and that counter-twist is what brakes the rotation. Don't swing your arms wide; fold them lightly in front of your chest to stop faster.

5. As you stop, load the board into the pose.

   For a nose press, drive your weight onto the ball of your front foot and bend that knee, easing the back foot off so your weight settles firmly over the front foot. For a tail press, sit toward the heel side of your back foot and drop your hips right over it. Keeping your pelvis stacked over the board keeps the pose steady.

6. To resume, take the wound-up upper body you braced with and lead it again toward the way you want to spin, releasing the twist.

   Wind, then unwind shoulders → hips → board in order and the rotation picks back up smoothly.

7. To switch directions, swing that stored twist the other way.

   Turn your shoulders the opposite direction and your hips and board get pulled into a reverse spin.

You can pin your own clip to the tricks you've landed (My Video).