Windows 7 will be officially released in a couple weeks, so lots of articles and books are starting to get published.

One of the best such articles I have ready is 77 Windows 7 Tips.  It contains lots of tips aimed at users who are comfortable with technology, but also has tips for anyone, regardless of proficiency level.

I have been using Windows 7 since July, and I must say it's an absolutely wonderful operating system.  It has been rock-solid stable, and I love the various changes they have made to Vista.