• Internet History
• Blogs
• Wikis
• Photo Sharing
• Groups
• Personal Information Search Services
• Google Tips
• Top Web Sites
• Cool Web Sites
• Top News and Information sites at CEOExpress.com
• Search: Find People
• Internet Archive WaybackMachine
• NetNews
• Online Buying (Auction etc.)
• Credit Card Fraud
• Online fraud, scams, hoaxes, email chain letters & Urban Myths/Legends
• Virus Warnings and Security Protection
• Interesting Sites
• Glossary
• Humor
• Animations and Videos (cute or interesting shorts)

Other good reference sources:

• www.wikipedia.org
• about.com
• enotes.com - Study guides
• infoplease.com and factmonster.com
• answers.com
• howstuffworks.com
• howthingswork.virginia.edu