A CV values your experiences, your skills, your dynamism, your interests, your leisure activities.
Also, think of highlighting your actions as a volunteer, your stays abroad...
Some advice to write up your cv:
Your cv should be consistent with the field you wish to do your internship in. When reading it, the recruiter must be favorably impressed.
Do not overlook the page layout since it is meant to provide a positive image of the applicant.
Chose a clear, simple and well spaced out presentation
3 questions you must be able to answer when applying for an internship offer:
Only after answering these questions will you be able to start writing up your letter of motivation.
If you intend to put forward information about the company, be sure your sources and information are correct.
The slightest error can affect your credibility.
A good letter of motivation is composed of 4 paragraphs on a single page.
A tedious and time consuming reading might be negative.