We had a professional model talk to our toastmasters club, and she recommended standing in ballet pose (one foot slightly forward and turned out), shoulders at a 3/4 profile, lean slightly forward at the waist, relax the jaw and push your lower jaw slightly out, and smile with the lower cheek muscles (this is why many people think Americans have "fake" smiles -- a "natural" smile uses the upper cheek muscles, which make your eyes all poochy). She looked gorgeous when she stood like that. I looked like I was so top-heavy, the weight of my chest was pulling me over. lol.