Is your resume supposed to be a reflection of your overall application, or an addendum? To be more specific:
1. Is your resume a highlight sheet of everything you have in your application? Meaning it has the same activities and jobs you mentioned in your application so that it can be a one-sheet summary of your application.
2. Is your resume an additional resource in which you list other activities that you could not fit into your application? Instead of re-listing projects and activities already listed in your application, you use it as a supplementary resource and someone would have to see your entire application to get the full picture.
Any thoughts are appreciated!
Definitely the former. It should be the same document you would use in the market to find a job, albeit with an education focus as well.
If you look on the forums, a great thread was compiled a few years ago by bb with resume tips: http://gmatclub.com/forum/best-resume-cv-format-templates-117758.html