1. Definitions - 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.
2. Local search - 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.
3 .Phone number lookup - Enter a full phone number with area code to display the name and address associated with that phone number.
4. Find weather - Type weather followed by a zip code or city and state to display current weather conditions and forecasts for upcoming days.
5. 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
Source : forum.abfun.net