Your CV should be in reverse chronological order detailing you’re most recent or current position first. Start by documenting your career history, and remember that employers want to know what you can do for the organisation they are hiring for. This means that your priority should be your experience that is relevant to the role you are applying for. Write down a history of your positions over the last 3 to 5 years, and detail all your roles, your specific responsibilities, and maybe a little bit about each company.
Also, it’s always a good idea to have 2 or 3 different types of CV that describe what you do from different aspects. For instance if you’re a hotel manager, you may want to have one that is more descriptive from a hotel perspective with a lesser emphasis on the management, and vice versa, for those more management orientated positions. There’s no ideal format for how you should write your CV, nevertheless it’s good to tailor it to the position you’re applying for.