Best way to get new clients as a new freelance developer?

Hey guys, I want to freelance part-time while I complete my studies. I recently found work on a 5 week contract for a local developer. I found that job by e-mailing every mobile app developer in my city to see if they had work available. I need some advice on finding more work. I read this article http://robbieabed.com/how-to-make-money-as-a-new-developer and tried its advice. Thus far it's been unsuccessful. What would you guys recommend?