When you're first starting out (and from that point on!), good photography is important.  Your photos are your selling point. They most often create the first impression. A viewer will make judgements about your personality, your professionalism, your eye for detail, and your level of expertise based on what they see in your photos. You owe it to yourself to only put up your very best.

Breathe 

Although sometimes concentration enhances a good photograph, obvious concentration can distract and often ruin a good photograph as well. Do not hold your breath for a modeling pose; always remember to breathe and appear at ease. 

Posture

Bad posture is an unrecognized flaw in many people. However, for models, posture is a harmful flaw. Always remember to keep your back straight and your shoulders up. Slouching affects the mood of the photograph and enlarges the appearances of your stomach. In addition to your back and shoulders, always remember to flex your stomach muscles. Despite your weight or state of shape, your abdomen will appear more toned if you flex.  

Limbs

Symmetry is officially out in the modeling world. When posing, make sure to differentiate your arms and legs with asymmetrical poses. If you have one arm long and straight by your side, make sure the other arm is bent. Whether a big or small angle, the bend will make the modeling pose look more real, less artificial. Continue the asymmetry to your legs. If one leg is locked straight, give the other leg a casual bend