Understand the browser and learning how to 'think in CSS' is the biggest trick I've found to being able to work in CSS efficiently. That, and experience. Very

Understand the browser and learning how to 'think in CSS' is the biggest trick I've found to being able to work in CSS efficiently. That, and experience. Very rarely do you actually encounter genuinely new layouts in CSS, so with experience you just end up building in your head your own little 'component library' and pattern match designs to that.