Many people are taught to be humble. We're told it's not socially acceptable to brag.
Perception is reality.
In fact, most people form an opinion of you in the first 10 to 40 seconds of meeting you. So, if you're serious about getting ahead, you must take a serious, objective look in the mirror. How you look and how you relate to others could carry more weight in your job search than the skills you've worked so hard to acquire. If you were marketing a product, you'd devote plenty of time to understanding its features and benefits. You might even conduct focus groups to see how others interpret what they see.