Who want's to learn? Hope these tips help:)
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Stretch it Out
When posing on the ground, make sure to stretch out your legs. This will elongate your body, making it so you're not cut off at the knees.
Take it to the Edge
Always sit on the edge of the chair. Your posture will look much better and remember - the closest body part to the camera always looks the largest.
Your Best Side
Turn sideways to the camera, planting one foot in front of the other. Point your toe to the camera and place all your weight on your back foot. This allows you to look thinner by centering your weight away from the camera. (This is a great trick the celebs use!)
When taking a photo it's important that your photographer does not snap the picture from below. This adds another 20-50 pounds to the 10 pounds automatically and annoying added by the camera. So bend down so they can get a great angle from up top!
Be aware! Pull head slightly forward, and tip chip down to minimize any appearance of a double chin. Hold your arms slightly away from your body. This keeps upper arm flab from flattening out.