Some people make the mistake of treating their cover letter like a CV, or an essay. It is neither. A cover letter is a cover letter, and should be short, pertinent, and actually complement the CV rather than just copy or be a substitute for it.
Another mistake people make with cover letters is that they underestimate the importance of them. A good cover letter can often be the deciding factor as to whether your CV gets read or not. There is no point in paying good money for a professional CV writer to write your CV if you are going to accompany it with a DIY cover letter. When you apply to jobs you need the complete package; i.e. a first class CV and a top-quality cover letter.
At CV consultants we have vast expertise writing cover letters for people in all job sectors and at all levels from junior positions right to senior executive/MD/CEO/CEO etc level.
We help people from all over the world improve their job prospects. We can help you too.