Most colleges ask for a CV. Is there a specific format to follow while drafting one? How many pages should an ideal CV have? Some colleges do not specify a page or word limit for their CVs. Also, what should the CV contain? Work experience, or academic achievements, or both and in how much details should these be described?

This is a good website about writing a CV,,hope it helps

http://www.dartmouth.edu/~gradstdy/careers/services/vita.html

By the way i also found online the CV of a person who is doing a Phd at Harvard,,,if it works for Harvard it works everywhere in my opinion,,you can also use his as an example

http://harvard.academia.edu/JamesJumper/CurriculumVitae

Good luck :)