Almost everyone who ever wrote a resume knows that sometimes you need more than boring facts to catch the employer's attention. One may need something more specific to personalize an application, to add some spice to the dry facts and to make the application noticeable and competitive. In this case, a special type of application paper like cover letter may come in handy. It provides an excellent and rare opportunity to elevate the level of uniqueness of your requisition and to make the right impression on a potential employer. The main idea is plain. You have to assure the audience that you are a prime and superior candidate. The performance of this idea is not simple at all. What makes a cover letter engaging? What special skills and practice can you show? Only the best cover letter may guarantee your success. In any case, you have to make an effort and think twice to formulate all your merits as well as understand which side of you to present. So, what is a cover letter, how to write it well and how to eschew common mistakes during this work?