The CV or resume is one of the few documents that could make or break your chance at getting an interview for that new job. Alongside the cover letter, the CV is the window into your skills, personality and background which a prospective employer can use to see if you could be a good fit for them.
One major thing to remember with a good CV is to make sure it is no more than 2 pages long, and certainly no less than 1 and a half! Any longer than 2 pages will make your interviewer lose interest, or think that they have been exaggerated.
Employment history should be kept to the last 5 RELEVANT years. If this is the first job since studying, you can list any part time work as “variety of part time jobs through university” or similar. The relevance of past employment will help the new employer see why you would be a useful addition.