Google Guide: Interactive Tutorial Making Search Even Easier: A good tutorial on how to plumb the depths of Google.
If you’re like many people, you use only a fraction of Google’s features and services. The more you know about how Google works, its features and capabilities, the better it can serve your needs.
Just as the best way to learn how to sail is to sail, the best way to learn how to search with Google is to search with Google. Consequently this Google tutorial contains many examples and exercises designed to give you practice with the material presented and to inspire you to find amusing or useful information.
Via Boing Boing.