Use a camera with a polarizing filter to reduce the glare and reflections, if you can rotate the sign also.
Try not to blast the camera with the whites of your eyes, skin looks fake
Step away from the background, an out of focus background is less distracting, but make sure the photos you select have your eyes in focus
Try not to use photos with cut off parts of hands, or ones that look washed out
If I can not see you then a photo has minimal value in a models portfolio
When posing try not to point toes at camera, because of the body positions you have selected you have no apparent neck
When selecting photos for your portfolio, make sure your eyes are in focus, try to keep the skin real, the idea if I’m selecting a model for a shoot I need to make sure she can pull it off, when the skin is over retouched I have no idea if you are trying to hide something.
Remember the photos are trying to sell you as a model