Learning how to sell yourself
It is not useful to invent experiences that we are not capable to prove, or to exaggerate knowledge. In a CV we always have to tell the truth, although it depends of how we choose to express that, in front of people. One piece of paper with our experience, in a very truthful and concise manner, is better than many pages with false information. Besides, the consultant offices accustom to store the CV of the candidates; that is why there is a risk we will be caught in that lie.
To omit is not to lie
You should not write exact dates (days, months). It is better just to mention years. This is useful to hide inexperience, or not too much time in a job. If we accustom to change frequently of job, it can give us a bad image. That is why it is a good idea to omit that information.
When you have a fair amount of experience, you can omit some previous jobs and courses and include only the most relevant. The CV will have a better way to be read if it is made in just one or two pages, and the information put in it is of quality. A speech of two hours about any given topic must not be considered as a seminary (and it must not be included).
Everything is experience
Jobs in familiar business, student activities in companies or similar labors are good ways to prove experience; that is the reason we should add all the scholar studies that were useful for your professional training.
Jobs without pay are useful for those people without experience. You should work in at least one free job and, therefore, in your next job meeting, you will be able to say that you have worked in some plan related with your professional area.
Organization and concision
You should keep a certain order if you want to have a CV easy to read, and, in order to get it, you must use just one or two pages. With this purpose, it is necessary to be concise. We have to divide the CV in two sections. First the personal information (full name, place and date or birth, nationality, marital status, full address, telephones and email). After that, scholar information, job experiences, include reference data (you can order it by date or by relevance) and, at least, your academic courses (idioms, computer science, etc)
No matter what style you choose to present your CV, it has to prove professionalism and has to be easy to read.