If you want a promotion at your job, then start performing the duties and responsibilities required at the next level, and work on doing different tasks. If you want to switch industries or roles, then start gaining the experience and knowledge needed for those brand-new positions. Take classes, freelance, or even offer your services for free just to gain the experience you need. For example, if you want to get into mobile development, then you should learn how to code using classes and online information and start attempting to make apps on your own.
Just remember: your track record speaks for itself!