The easiest way to turn those boobs into pecks is simple...
A good diet will also take you closer to your goal by cutting fat.
I had man boobs a few years ago, and within 3 weeks, they were gone and i was showing respectable pecks.
Before I started working out, I used a "power t shirt" that looks like a regular t shirt that flattens out your chest and makes it look like you have no man boobs. They work really great.
The website is at http://www.chestfxstore.com if you would like to check them out.
I really hope that this help you out.