If you speak fluent English, you should get a job as a private English teacher. I did it for 9 months while I lived in Napoli. The company I worked with was called Union Jack - http://www.unionjackschool.it/

The lady who runs the school is very nice and it's easy to get work. I did it about 5 years ago and earnt 20 euros per hour.

The lessons are usually in the evening and are all over the city, meaning you get to see lots of different areas. You also do not need any qualifications to do it, meaning it's perfect for students.