Cover letters allow you to give the employer more information than your resume presents on its own. They offer a chance for you to impress the recruiters by expressing yourself and your abilities.
Here is a list of common mistakes that people make when sending their cover letters:
Grammatical and Spelling Errors- Anything that you send to a potential employer should be checked and re-checked by both you and at least one other person. There is absolutely no excuse for any grammatical or spelling errors in your cover letter or resume.
Not Bothering to Customize – You should not send the same cover letter to every job you apply for. The cover letter (and resume) should be tailored for each position. The best way to do this is to pull key words out of the job description and relate them to yourself and your experience. Also make sure to address the letter to a specific person (if a name is given) and include the company name. Remember that a “generic” cover letter and resume will be easily recognized by a hiring manager and will almost always earn your application a trip to the “no” pile.
Forgetting your Signature - If you are mailing a hard copy or faxing your cover letter, make sure that you sign the bottom. It is a cover letter and should end, as a letter would, with “Sincerely,” and your signature. Note: When you are e-mailing your application it is okay to type out your name at the bottom.
Length is Too Long or Too Short - A cover letter, in correct letter format, should take up almost a full page. It should not be more than one page and it should not simply be a paragraph announcing the arrival of your resume. Usually 3-4 paragraphs comprised of a short introduction, at least two middle paragraphs containing what makes you a good fit for the company, and a closing paragraph with your contact information is the best way to go.
Using a Weak Opening - There’s no doubt that your resume says a lot about you, but a well-written cover letter will say so much more. Make the opening something that will catch the hiring manager’s attention. The best way to do this is to reiterate what they are looking for and why you are the best candidate for the position. Catching their attention right away will make them continue reading.
Not Following Instructions – Companies will often specify certain things they are looking for. For example, if the job description asks that you send salary requirements or references, make sure you provide them. Also pay attention to any formatting instructions (file type, e-mail format, etc.). You do not want the company’s first impression of you to be that you can’t follow their simple directions.
Make Sure to End on a Good Note – End your cover letter by thanking the person for their consideration and provide them with your contact information. You can also add that you will follow up with them in a few days (this shows that you are interested in the company and position).

