The covering letter
CVs are seldom used alone, they should always be introduced by a letter or a telephone call. The letter can really let your personality come through. Remember, recruitment consultants and employers read hundreds of CVs, an interesting introductory letter can make yours stand out.
Your letter can be used to pick up points which modesty or space prevented you from including in your CV (i.e. to highlight your key strengths relevant to the job). An introduction letter can save you from having to rewrite the CV each time you want to target your application to a specific advertisement or sector. Nevertheless, keep your CV up to date. Using an out of date CV looks sloppy at best and may exclude you from consideration.