Excited to be inside? Just what are you IN for? Whether it's your first day, first promotion or first all-hands call from the C-suite, unknowns behind the glass doors can make or break you, thrill you yet threaten your position, and secure or disrupt your life if you don't come prepared to meet new challenges. This is the moment when realizing and understanding what you don't know becomes critical to your success. Mastering the unwritten rules will make you remarkable as you learn to adapt, present, and represent.