What is a good way for a 19 year old kid to make good money?

I have worked a lot of jobs....restaurants, sales, tutoring. I want to make money this summer, and am willing to work hard, but feel disillusioned at working a ridiculous amount of hours at a fast food place again to make a minimal amount of money. This summer, I need to find a good way to make money. Any suggestions? (No get-rich-quick make money fast scams!)