[header] How to write a letter of interest [title] Think about skills you possess that you will be able to use at this new job. [step] Some of these should already be listed on your resumé, but in your letter of interest you'll want to emphasize everything that you can possibly bring to the table. [title] Explain your purpose immediately upon beginning your letter. 
[step] Tell your reader how you became aware of the job opening and express your desire to fill it. Keep it short and sweet-this reader may have already seen dozens of letters of interest that day, and you don't want to bore them.