My Notes App rule: I have only as many Notes as the screen will fit without having to scroll.
I used to start new Notes all over the place. New book recommendation? New note. New to do list item? New note. As a result, everything got buried and nothing got done. A little piece of my brain was constantly stressing over the clutter.
So I broke my Note-taking into 11 categories, as many as would fill the screen.
P.S. Isn’t iOS 7 gorgeous?