I think it depends upon what you want from the job. Do you just want to keep the job and not move up? Do you want to stay where you are at, but be considered only "good?"

If you want to really be a good employee, you could get to work early, ready to do work, dressed quite appropriately, with a good attitude (putting personal items out of your mind.)

If you also want to move up in the company, you will do more than your job, stay later than you're required to (if allowed) return from breaks early, have a great attitude and offer to help other employees. You'll learn more about the company you work for, and their main goals as a company. You'll ask questions from your supervisor as to how to improve and how to help the company improve. You'll offer suggestions. You will also not become upset when others get noticed, or promotions. You won't care who gets the outward credit, as long as the company excells. (You will feel good about asking for raises, though.) You'll offer to learn other jobs within the company. You'll take educational courses you need to improve your own personal skills, either with the company (if offered) or on your own (community college.)

Remember, if you want your manager's job, you have to dress like, act like, a manager, and know how to do that position. TC!