The next part is really quite simple, you just need to find something tight weaved to pour your yogurt through so it can drip and release any excess whey and moisture. This is what gives the yogurt a nice greekish consistency. See below:
This is a large flour sack towel, which is quite a bit thicker than cheesecloth, but not too thick for the liquid to pass through, and it also won't leave lint in your food. You can usually find these at a cooking store, or anywhere you can get canning supplies. Or you can order them on Amazon.com
This process usually doesn't take more than an hour to hour and a half, at which point I dump the thickened yogurt into a container, and scrape the excess off the towel with a spatula, then put it in the refrigerator to cool and solidify some more.
You can add fruit, maple syrup, Agave, or any other mix ins you like and get that creamy, rich flavor you get from other store bought greek yogurts, while knowing that yours is much healthier. Enjoy!
PS, if your'e looking for another great yogurt maker, I recently purchased the Dash Electric Yogurt Maker from Amazon, and it has a mesh strainer included for making greek yogurt! Love it!