First impressions transmit powerful messages. While an individual's perceptions should be based on what a person knows rather than how he or she looks or what is posted online about them, most people form an opinion about another person when they first meet (either in person or in cyberspace). The first impression should be positive, communicating a message to others about the self. Professionalism encompasses many aspects of your work life including demeanor, appearance, appropriate attire, business and dining etiquette, managing online personas, written, email and interpersonal communication skills, social and professional networking, and interviewing skills. This section provides general guidance on taking charge of your professional development and managing your online image.