- Display - block, inline-block, none (vs. visibility: hidden;/opacity: 0;).
- Positioning - Relative, absolue & fixed.
- Element dimensions and Chrome dev tools - width, height, padding, border, margin.
- Colors - text + background.
- Psaudo elements - :before, :after, :hover, :click, :focus.
- Advanced selectors - attribute selector, psaudo element selector, positional selector (:nth-child), combining selectors (http://css-tricks.com/pseudo-class-selectors/)
- Sprites - concept
- Overflow - container scrolling