How much information do I have to include?

The cover letter is an invitation to read your CV and as such it should be enticing the reader to want to know more about you. The first paragraph should mention the job title and the publication in which the advertisement to which you are replying appeared. In the middle paragraph(s) mention how your achievements match the major job requirements or specifications of the position on offer, but do not go into too much detail; leave that for your CV – there is no point in duplicating your CV in the letter. If you have any awards in relation to your work, mention them here. In the final paragraph you need to say you are looking forward to hearing from them and sign off. Be courteous and polite. If you are returning an application form, do not go into too much detail at all, unless specifically requested to do so. In this respect, the cover letter is just a courteous formality as the application form is designed to provide all the information an employer requires.