What is an effective get money quick scheme?

Hi Yahoo community, I ama 17 yr old bloke living in Australia, i work a casual supermarket job and just don't make enough money, I can't get more hours as it interferes with my university times. There's a whole assortment of thing i would like to do, such as getting tattoo's, buy a car, go on a road trip, and basically have more booze money. If anyone has any suggestions please let me know!