Your teen was likely thrilled to score that part-time job delivering pizzas: Free pizza? Getting to drive around town on the clock? Tips? However, your teen might want to reserve some of those tips for car insurance. In fact, they may need to up their coverage, or, in some cases, switch from a personal to commercial policy. Simply put, personal policies are written with the average private citizens habits and needs in mind, whereas commercial policies are designed to address t...