The way we write CSS has changed a lot in last few years, and the abbreviation jungle gets deeper and deeper. Heres a list of links to influential articles and quick summaries of these techniques.
More→Here's a very simple checklist that you can go through before launching a site.
More→Comes handy in checkboxes and radios.
More→Here's a selection of pure CSS solution to some common layout issues. All of these work in IE 8.
More→If you've designed a button that looks like a link, and you still wan to be semantic, then this mixin may come handy.
More→I refined the beveled corners method I posted about earlier. This includes a bunch os Sass mixins that do all the dirty work for you.
More→Here's some pure CSS trapezoids for you.
More→All the tasks that are related to making your site faster should be as automated as much as possible. No one likes optimising photos with Photoshops "Save For Web" or pasting unminified code to a web app and then copying it from there. All these tasks can be automated by using the modern web development tools.
More→These can be stretched as large as you need.
More→You can easily say: is not Internet Explorer.
More→Club-Mate, the beverage → club-mate.fi