1. Using multiple search terms (up to about four) will increase your likelihood of getting the specific information you want. (For example, instead of typing Canada, try Alberta Canada backpacking.)
2. Use the minus sign when you don't want a topic included in the search results. (For example, type Paris tourism -art to find non-art museum attractions.) Note: When using the minus sign, be sure to include a space before it.
3. Using quotation marks ensures that your search will locate the entire phrase. (Type "Leonid Meteor Showers" and your search won't turn up bathroom fixtures or former Soviet leaders.)
4. If you want information from a specific time frame, you can use two periods to specify a range of dates (for example, labor statistics 2000..2004). You can also use the Internet Archive to find information that was once online but no longer is.
5. The label "Sponsored links" means advertisers have paid for those results to be displayed.
6. Use RSS to track specific topics through free services like Newsgator.
7. If you're uncertain about a word's spelling, use a tilde in your search term (for example, for microdermabrasion sites, simply type microderm~).
[ via Real Simple magazine, January 2006 ]