Links

What to learn from:

webpagesthatsuck.com

HTML tutorials & help:

webmonkey.com
htmlhelp.com
sitepoint.com
frontpagewebmaster.com
htmlcenter.com

Web Standards:

webstandards.org

PHP:

phpresource.org

DHTML:

dynamicdrive.com - some cool DHTML effects

Javascript:

javascriptkit.com
gamelan.com

Accessibility sites:

cast.org/bobby - analyses individual web pages to see if it meets basic accessibility criteria
trace.wisc.edu/world/web/ - guidelines for accessible web design
rnib.org.uk/digital - Royal National Institute for the Blind resource for web authors