Believe it or not if you are new to iOS 7 and the NEW Notification center or even the old one if you are the only one left who has not upgraded to iOS 7...LOL it is actually very simple as i see it in 2 parts. The part where you have control of what you allow the notification to show you and the apps you don't want the Notification Center to show.
This is a good start for you:
Notification Center | iMore
This is a good start for you:
Notification Center | iMore