Make sure you choose a cover letter format that you feel most comfortable with. It should be something that could best express your personality but keeping it as formal as possible. Be wary of the details of the cover letter format. It must be clean and neat. It should provide the data directly. There is no need to be colorful or playful with the fonts.
For you to be able to make an effective cover letter, you should be able to follow at least the basic format which should never fail to address three general issues: 1. First Paragraph _ The reason why you are writing. 2. Middle Paragraphs _ Facts about what you have to offer. 3. Concluding Paragraph _ Methods for you to follow_up