Everyone wants to look good, especially in the photos, and why not? It is everyone's right and requirement as well, to be looking good and attractive. For that one purpose, tools and a lot of them are designed, techniques are developed and everything has been done to crack the secret of looking good in pictures.
Just as they say, you are gorgeous just the way you are. 'Course you are, all you need is a little change in perspective (of the camera) and a few tweaks here and there to bring out the best of you. And like always, the best advice comes last.
Do not stand like a cadet, you got curves girl, flaunt 'em and if not then create them. Changing your standing posture can dramatically bring in hidden details. And never ever let those arms left hanging, I repeat, NEVER.
That means your knees, ankle, arms, wrists and every other freaking joint. Bends introduce curves and dynamics of the anatomy to the picture. But too much, and you'll end up making awkward angles and poses.
Standing straight towards the camera doesn't seem natural. While sideways, gives a caught-in-the-act (of being beautiful) kind of feeling which seems more natural. Apart from that, the width of our frame is reduced sideways which gives a more consistent and flowing figure.
Look how the curves and details are enhanced just by slight bends and slacking up the body a bit. Also, the sideways perspective really brings out details beautifully which would be hidden if square with the camera.
Slanting forward looks friendly and open while cross armed else it is but defensive in nature. Also, tucking your hands in is again not really friendly. Also, it reduces the visibility of double chin and/or excess fat bringing out curves and decreasing inconsistencies.
It'll bring in inconsistencies and ruin the details, which as such won't be enhanced by the fingers.
Weight should be put on the foot behind, while the front foot should close in and bend to give you that easy carefree lean, looking all relaxed. Combine it with tilting your face a bit too. It'll also add dynamics.
All the basics combined with that beautiful smile, make up for the best of you in the photograph. Look how relaxed and natural the whole set up seems with just tweaking your stance.
Similar measures need be taken as for the standing positions. Add to it a somewhat higher or not lower than your face.
Instead, extend your toes.
Either stretch a little forward or pull 'em back a little (recommended when very close to ground). Also, try twisting a little towards the camera instead of only the neck.
Hire a good photographer, then play around, be naughty, laugh, enjoy and most importantly, smile and let the clicking be his problem; if he's good he'll get it all right. So ladies, be happy and be beautiful. And share the secret with everyone around.