Many people ignore the importance of a cover letter. It is the first contact the organization you are applying to have with you. You should therefore strive to make a good impression. Many employers admit that when they come across a good cover letter they tend to give the applicant more consideration.
Writing a good cover letter requires that you have some knowledge of the organization and what they require. Good background knowledge will help you to know what approach to use in your cover letter.
A good cover letter is brief and straight to the point. Don’t beat around the bush. Your audience is most likely busy and does not have the time to read a long redundant letter.
A good cover letter should get you that interview. The best way to do this is to sell yourself actively. Show the employer what he would miss out on if he does not consider you.