When you forward your resume for a job, the idea is to give sufficient information for getting the interview.

Similarly the covering letter should give a very good introduction about yourself and make the recruiter read your resume.

The importance of the covering letter should not be trivialised.

Write a covering letter which is short and sweet.

It should carry only the relevant information and it should tie in with why you feel you are suitable for the job.

Dont clutter the letter with fonts, highlights and emoticons.

Remember one thing, the covering letter should focus on getting you the interview so that you can nail the job.

Best of luck.