A good covering letter contains:
An announcement that resume is enclosed
An aim to persuade the employer that candidate is right person for job
Tips for Cover Letter
Cover letter should be only one page long
Keep it simple, smart and easy to read - using the same font and style as used in resume
Make it personal
Decide what makes you unique
Think about specifics
Flaunt your achievements
Use plenty of white space to give cover letter a lift
Use blank lines between paragraphs.
Leave enough space for margins
Cover letter should be error free
Proofread cover letter
Proof reading by good spell checker- sometimes a fresh set of eyes can catch a mistake you’ve overlooked.