I started reading books again but it took a new feature in iOS 6 to not distract me anymore. I got my focus back like in pre-iOS 3 days, when notifications were a thing we could only dream about.
Notifications will now be hidden, and the multitasking tray and Notification Center can’t be invoked anymore.
Switching to your distraction apps now takes 3 clicks on the Home button, filling in a passcode, a tap on the ‘End’ button and a click on the Home button. Enough of a hassle to stay focused, I believe.
Give this a try if you’re in a writing or reading mood. It really helps for me.