Pull up the definition of the word by typing define followed by the word you want the definition for. For example, typing: define bravura would display the definition of that word.
Visit Google Local enter the area you want to search and the keyword of the place you want to find. For example, typing: restaurant at the above link would display local restaurants.
Phone number lookup
Enter a full phone number with area code to display the name and address associated with that phone number.
Find weather and movies
Type "weather" or "movies" followed by a zip code or city and state to display current weather conditions or movie theaters in your area. For example, typing weather 84101 gives you the current weather conditions for Salt Lake City, UT and the next four days. Typing movies 84101 would give you a link for showtimes for movies in that area.
Track airline flight
Enter the airline and flight number to display the status of an airline flight and it's arrival time. For example, type: delta 123 to display this flight information if available.
Enter a UPS, FedEx or USPS tracking number to get a direct link to track your packages.
Find PDF results only
Add filetype: to your search to display results that only match a certain file type. For example, if you wanted to display PDF results only type: "dell xps" filetype:pdf -- this is a great way to find online manuals.
Use the Google Search engine as a calculator by typing a math problem in the search. For example, typing: 100 + 200 would display results as 300.
Quickly get to a stock quote price, chart, and related links by typing the stock symbol in Google. For example, typing: msft will display the stock information for Microsoft.