Do not hesitate to go into some depth technically about the projects you have worked on. Ensure you do not leave the reader to assume anything. If you have been working for a number of years you do not need to include any part-time jobs, vacation jobs, voluntary work or unpaid work experience unless especially relevant to your career. However you might want to include these jobs if they covered a period of unemployment.
Education / Qualifications
List your qualifications and education history, for example: BSc (Hons) 2:1 in Computer Science at the University of Birmingham, 1980 - 1983. A Levels: Maths (A), Biology (B), Chemistry (C) at Warwick School, 1978 - 1980. O Levels (or GCSEs if you did them): Maths (A), English Language (A), History (A), Geography (B), French (C), Chemistry (C), Biology (C) at Warwick School, 1973 - 1978. If you have a degree you do not necessarily need to list all your O Levels/GCSEs; just listing the number is probably sufficient.
Briefly list your professional qualifications, membership of professional associations and professional ID numbers.
If you have foreign language skills which may be relevant for any jobs which you are applying for, please list them and indicate whether your skills are spoken, written, business or technical. Please also indicate your level of fluency: fluent, good working knowledge, etc.
Interests / Hobbies
List your interests, hobbies and any sports you play. List any positions of responsibility you hold or have held in any club or organisation, and say what your responsibilities and achievements were.
You do not normally need to list referees on a CV, but it is a good idea to think about whom you could ask now.