This is the best breakdown of selectors I've seen. An excellent reference for all Web developers.
I've had this desire at the back of my mind to re-learn a lot of the knots I've forgotten since my days as a Boy Scout. I'm rather embarrassed that I remember so few of them actually. Andy's collection of knots looks like a great place to start digging in.
Bonus: knots look like a fun way to keep my hands busy while watching TV.
An amazing selection of historic map reproductions.
Dave Rupert provides an excellent breakdown of how to speed up your WordPress-powered site. There's no excuse to not spend the time implementing these changes. Even if you're like me, and have already done a lot of the work, I'm willing to bet there's a step or two that will make your site even better. For me, it's the super-duper-easy cut-and-paste improvements to the htacess file to enable gzip and browser caching.
A cross-reference that indicates the degree of compatibility between fonts. This is ideal for selecting combination of fonts for a layout, though I wish it were newer and included a larger set (it was created in 1992).