Cooking a full turkey is no easy task and many of us don’t have much practice. If you’re in charge of the bird this Thanksgiving, there are a bevy of ways you can screw it up. Don’t panic just yet, most of these poultry blunders are easily avoided, but knowing where the pitfalls are to avoid dry meat or not enough food for your guests is the first step in nailing your Thanksgiving turkey.To get the skinny on common turkey mistakes made on Thanksgiving, we asked Heidi Diestel, a fourth-generation turkey farmer…