A couple of nice pages describing useful web stuff
The first is a great discussion about CSS, very handy, both score a 10 or 15 depending on your scale.
http://blog.jm3.net/2007/03/16/the-only-ten-things-to-know-about-css/
The second is about handy javascript snipits:
http://www.igglo.co.uk/6/15-javascript-snippets-you-cant-live-without/
Both are via the DZone.