Below is a list of useful links that I recommend visiting. Responsibility for content lies entirely with the website owner.

Research

Wikipedia
The online encyclopedia that anyone can edit. Provides up-to-date information on just about everything, one that I visit almost on a daily basis.
HTML Dog
A fantastic resource for HTML and CSS with simple and clear guides for implementation.
A List Apart
Online magazine-style website offering help and advice for web developers.

IMD