Be sure to actively recruit the students that might not normally be attracted to science, technology, etc. The ones that are great at creative writing or are taking journalism or marketing classes. They can write your brochures, etc. The ones who already are accomplished website people. They can create your website for you. The student that is great at graffiti might turn out some awesome t-shirts if asked. The ones who are thinking about becoming accountants can have some hands-on practice managing the team budget. Demos might not attract these types of students, but word-of-mouth, or recommendations from teachers might help identify them.
Recruiting and retaining mentors ideas can be found
here.