In a competitive job market you need to make sure that you stand out from other applicants. A well written CV and covering letter can be effective marketing tools, helping you make a positive first impression with potential employers.
There is no definitive 'best style' of CV, since the style and content should be tailored to the specific postion that you are applying for. This page provides examples of CVs from University of Birmingham postgraduate researchers to illustrate the different styles and formats that may be used. Both CVs for academic positions, and CVs for jobs outside of academia are covered.