Thinking In Terms Of iOS 8 Size Classes by Justin Williams
Since I use and recommend Interface Builder, my work load is significantly less than those that are still living by the “write everything in code” mantra. If you find yourself still in that camp, I’d highly recommend using iOS 8, Xcode 6, and trait collections as an opportunity to get on the Interface Builder bandwagon. It’s not only going to lessen the amount of boilerplate code you have to write, but it’s also going to simplify your code base by extracting out a lot of the trait handling into a visual UI.
I'm finding myself writing a lot of UI code lately, mainly because is how the project in my job is done. But I really love IB and it's even better in the latest releases.