What is a CV?
Curriculum Vitae: an outline of a person's educational and professional history, usually prepared for job applications (L, lit.: the course of one's life). Another name for a CV is a résumé.
A CV is the most flexible and convenient way to make applications. It conveys your personal details in the way that presents you in the best possible light. A CV is a marketing document in which you are marketing something: yourself! You need to "sell" your skills, abilities, qualifications and experience to employers. It can be used to make multiple applications to employers in a specific career area. For this reason, many large graduate recruiters will not accept CVs and instead use their own application form.
An application form is designed to bring out the essential information and personal qualities that the employer requires and does not allow you to gloss over your weaker points as a CV does. In addition, the time needed to fill out these forms is seen as a reflection of your commitment to the career.
There is no "one best way" to construct a CV; it is your document and can be structured as you wish within the basic framework below. It can be on paper or on-line or even on a T-shirt (a gimmicky approach that might work for "creative" jobs but not generally advised!).
