If you have are building a website, or want to improve the one you already have, sign up for the free Alertbox newsletter from useit.com. Alertbox is written by the guru of Web use, Jakob Nielsen.
The link to the newsletter comes every 2 weeks. It offers very interesting insights into how people use or fail to use websites. It covers design, navigation, user habits, likes & dislikes.
Rather than just spouting ideas on web use, Nielsen has empirical evidence to back up his findings. There are lists of the worst design mistakes, the best designs, guidelines , how to write for the web (scannable, short text, no scroll, bullets, inverted pyramid style), and the most hated advertising techniques. Jakob will even help you with blog design.
Jakob Nielsen has been writing on the subject since 1995.
