I always like to say that there are a few steps you should go through as you hit each pose onstage.
1- Set your legs. "spread the floor" by pressing down and out in order to really get the upper quads to pop from the front. Squeeze your glutes and imagine pulling your feet back along the floor, like wiping dog crap off of 'em, to get your hams to show from the rear.
2- Take a deep breath to fully expand your rib cage and get any extra torso girth you can!
3- Pose your upper body while maintaining flexed legs and a big torso.
4- SMILE like there's nowhere else on Earth where you'd rather be!