These are some helpful links and resources.
Smashing Magazine – Great blog site for web and design tips and resources.
W3Schools – Tutorials, help, and certifications for various web technologies – html, xml, css, php, flash, etc.
WordPress – Very versatile blog software (open-source).
Path to SharePoint – a helpful blog/SharePoint site with useful tips/tricks on various goodies you can incorporate into SharePoint as just an end user.
W3C – World Wide Web Consortium. Validate your code here.