I've been using NGUI for a few months now and I'm finding the learning curve for layout is steeper than I expected. I spend a lot of time trying to figure out how to position elements exactly where I want on screen. One of the problems is that the UIAnchor control doesn't position relative to any parent except the screen as a whole. Also, UIAnchor offsets are in fractions of screen size, I often want to position in pixel coordinates.
I guess what I'm asking for is some kind of cookbook for common problems like relative/absolute positioning in both screen and pixel coordinates. Things like margin, padding. Things like matching borders, backgrounds, colliders to the size of content.