ASK HN: Easy ways for a web developer to make online cash?

I'm looking for some ways to make some cash online. I'm thinking of writing some Wordpress themes and selling them online. What could be some good avenues to creating some passive income online?

My Dev skills are: jQuery, HTML, CSS, Javascript, PHP, SQL and Coldfusion. I'm heavily experience in Photoshop and Design.

Any thoughts? I'm a college kid looking for a way to get some cash.