These are some attempted and genuine methods for collecting some fast cash while on grounds. Try to discover a neglected need and saddle it.
1. Do assignments/project works for others.
2. Sell stuff on campus
3. Run errands for others
4. Join SRC/Departmental council meetings.
5. Seek part-time job around the school
6. Be a teaching assistant or private tutor
7. For the artists: become a freelance graphic designer
8. Design and sell merchandise
9. Find a roommate and split that rent
10. Use the internet wisely