Web 2.0 is a fabulous way to improve your productivity. From scheduling meetings and setting up group calendars to serving as a space for collaborative document editing, there are a ton of free online tools that can make your life easier.
Zen to Done: The Ultimate Simple Productivity System
33 Rules to Boost Your Productivity
Massive List of Getting Things Done (GTD) Resources
10 Simple Tips to Start with Getting Things Done (GTD)
Twelve Ways to Prevent Burnout
Trimming the Attention Sails--strategies for staying focused.
Rolling Your Own Online Office--a guide to pulling together a variety of tools to create a virtual workspace.
Turn Netvibes Into Your Personal Office
The 13 Most Useful Netvibes Modules
How to Crank Through Your Gmail
Stay On Top of Your Field with Feeds
If you've ever tried to get several people to agree on the same date and time for a meeting, you'll appreciate Doodle, which uses polling to help you easily and quickly find common dates and times.
3 Ways to Web Enable Your Schedule
EverNote--a single place for all your notes
Annotate Web Pages with Sticky Notes and Highlighters
Bubbl.us--online brainstorming tool
Gliffy--Draw and share diagrams on the web.