Set-up: Set up on the floor resting on your elbows and toes. Place your elbows in line with your shoulders, and form a straight line between your feet, hips and shoudlers.
Lift: Brace through the core and maintain proper posture throughout.
Emphasis: Do not allow the hips the sag, or the butt to flare up above the back. Keep the shoulder blades back and together. It may be helpful to visualize proper standing posture - the posture here is the same, only your body is rotated 90 degrees toward the floor.