I'm going to cut and paste my usual cv advice that I give on these threads. If you do a search for cv advice or similar you'll find lots of previous threads with good tips as well.
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'Put personal information at the top (name, address, contact number only, not 'married 3 kids age 37 favourite colour blue').
Put a personal profile-type statement after that, just a couple of lines summing up what experience/skills you have to offer and the type of position/company you are looking for. Obviously make sure these tie in with the job you are applying for.
For each job, put dates, job title and employer, in reverse date order. For most recent/relevant jobs put a list of bullet points of main responsibilites and/or achievements. Do this with the job description for the job you want in front of you so you can emphasise relevant stuff.
Then qualifications/training. List in most recent order, include relevant training courses and higher education if you have it. Don't put Home Ec O Level. Everything on your cv should help you get the job you are looking for, and school exams usually won't unless you are a school leaver or very early in your career.
Don't put photos or anything else annoying and irrelevant, don't put it in a folder or on pink paper, don't staple it. It needs to be easy to read and easy to copy. Put page numbers and your name in the footer of each page in case of mishaps with photocopying.
It should be no more than 2 sides if at all possible. Don't leave gaps but jobs that were ages ago and/or are not relevant can be just listed with dates and little or no information about them.
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