All major commercial production teams and casting directors treat the commercial like a short scene. And so should you.
The best thing you can do to launch a commercial career is to join a high level craft-based acting class (many are not—do your research) and learn how to properly break down a scene: line-by-line work, character development, learning how to make winning choices, advanced third reality work, style, etc.
Getting this vigorous weekly workout is the prerequisite to any successful commercial career, as its aim is to keep you sharp, proactive and at competition level to succeed this olympic-like environment. At our studio, we help actors to launch commercial careers and make the impossibly brave choices that win the role.