Models learn quickly how to work the camera if they are going to be successful. Having knowledge of angles, lines, and appropriate personalities is the expertise for which a model is hired. Actors have to learn to do the same! Still cameras and film cameras are all recording and capturing. Even though one picture is static while the other changes, they both require the talent to know and do their part.
In the artistic craft of connecting with others, the adage "practice makes perfect" rings true! Learning subtle and effective movements can only be done by practice. And being able to connect with those around you is imperative.
The best way to practice is to get involved. That may mean starting with a less than glamorous situation. For example, actors may not be paid as a green talent working on a student film or a young model testing with a photographer. Doing the actual gig is only the beginning, though. After shooting, a talent must go back through their on-camera moments and find the things that worked . . . or didn’t.
Being aware is the first step to success. Then actively working toward avoiding the things that didn’t work and pursuing the things that did is the second step. Keep in mind that may mean getting a third party opinion. Some talent are never comfortable scrutinizing their own work. Some are much too forgiving of themselves, while others may be too proud of what they’ve accomplished to find the areas where they need to improve.
In the end, the goal of every shoot is to continue improving the craft. Practice in an educational institute means at least four years of daily training – why should talent work be any different in order to learn the skills needed to be at the top of your class?