The secret to cover letters is to make them as targeted as possible to the employer you are looking at. Two things to focus on:

  1. Why you want to work there – the kind of work it is, the wonderful things about the place, the challenges of the job that appeal to you
  2. What value you will provide them – your experience that matches what they want, how your skills allow you to reach their goals

Pick up and use some language from the job description and website. It’s a great way to let them know you did your homework, and to make sure you are getting the right key words.