from Oct. 2007 PCWorld

"Eight great, simple ways to hack the web"

• Google My Maps
  
• creation of RSS feeds - RSS spec ; feed generators - feedyes.com
• check/validate RSS feeds
• filter feeds - Yahoo pipes
• use Google Apps (e.g., gmail to be your domain's back-end email server) to run your domain services for free
• Synchronize your Google Calendar (e.g., with Mozilla's Thunderbird) or Outlook
• per PCWorld - "pimp your facebook"
• Firefox extensions

There's much more in the article - details about how to do these things, but thought I'd give you a summary/rundown, in case you don't have time to do a read-thru yourself.