When applying for a job, you should always attach a cover letter to your resume. It can help gain the attention of potential employers and, most importantly, convince them to read your resume.
A successful cover letter will set you apart from other applicants and give you a greater chance of getting an interview. It should be clear, concise and tailored to suit each job that you're applying for.
A cover letter should include an introduction and identification of the position, your qualifications and how they make you suited to the role, your reasons for applying and a conclusion. Ideally, it shouldn't be any longer than a well-spaced A4 page.
Make sure you identify your skills, experience and attributes that match the employer's requirements and selection criteria. Also take the time to research the organisation and highlight the key aspects of why working for that organisation is appealing to you.
As with your resume, make sure you proofread your cover letter several times. Even the best resume can fail if your cover letter is not up to scratch, and vice versa, so if in doubt ask someone to proofread it for you.
Before you submit your cover letter, find out the details of the contact person in the organisation and address your letter accordingly. If you're not sure, call the organisation and find out — a quick phone call may mean the difference between you getting an interview or not.
If you don't advance further with your first few applications, don't feel too dejected. Review and refine the style of your letter and your resume and seek advice from someone you trust.