Your cover letter should be on the same type of paper and in the same font as your CV.
Address it to the person mentioned in the advert.
Use the exact position title or reference code quoted in the advert.
Always include a cover letter even when one was not specifically requested in the advert.
Remember that your cover letter is a way of showing your reporting and writing skills.
Customise the letter in order to reflect the correct details of the recruiter.
Do not mention any salary expectations in the letter - that can be discussed during the interview.
Remember that your cover letter is not a copy of your CV.
Always mention one or two of your biggest achievements in your cover letter - prospective employers are looking for successful people after all.
Sign the cover letter at the bottom of the page.