Absolutely agree re: typography. Or to quote this great post from @iA, "Treat text as a user interface" http://www.informationarchitects.jp/en/the-web-is-all-about-...

It includes its own great list of other resources, including A List Apart and Thinking with Type.

I think a vast majority of websites ignore even basic principles like spacing, negative space, readability, and rudimentary concepts about typeface pairing.