While there will always be job-specific skills that an employer is looking for, most employers will also want you to have some general skills. These general job skills are sometimes called "employability skills".
Personal branding is the practice of people marketing themselves and their careers as brands. While previous self-help management techniques were about self-improvement.
Job shadowing is a work experience option where students learn about a job by walking through the work day as a shadow to a competent worker.
Low self-confidence isn't a life sentence. Self-confidence can be learned, practiced, and mastered--just like any other skill. Once you master it, everything in your life will change for the better.