Get the local time anywhere - not quite a hack, but a useful little tool regardless. Enter simply 'what time is it to get the local time in big cities around the world, or add the locale at the end of your query, like 'what time is it hong kong' to get the local time there.
Flying. Enter the airline and flight number into the Google search box to get the arrival and departure times right inside Google's search results.
Currency, metrics and other guffin: Google's powerful built-in converter calculator can help you out, convert measurements, show how many seconds there are in a year (seconds in a year) or how many euros there are to five dollars (5 USD in Euro).
Compare items with "better than" and find similar items with "reminds me of". The results will almost always lead you to discovering alternatives to whatever it is you're searching for.
Use Google as a free proxy: Google's cache to take a peek even when the originating site's being blocked, with cache:example.com.
Remove affiliate links from product searches by using -site:ebay.com -siteizrate.com -site:shopping.com operator.
Find related terms and documents: Adding a tilde (~) to a search term will return related terms. For example, Googling ~nutrition returns results with the words nutrition, food, and health in them.
Make Google recognize faces: A special URL parameter in Google's Image search will do the "Add &imgtype=face" to the end of your image search to just get images of faces only.
Essentially, there are two types of search engines, the first is called the searchable subject index. This type searches only titles and descriptions of sites. The other type is the full text search engine which uses "spiders" pieces of code to index billions of pages across the net. These pages can be searched by title or content, making for a much more efficient search application. Currently, on the Internet it's Google which is the prime exponent of this type of search.
The Google search engine is probably one of the most useful tool ever spawned on the Internet and anyone who uses it to simply check on a website based on key word(s) is hardly using a fraction of what it can do. Lets start that exploration with some of the terms you can use to add a bit more power to your search.
Google will search for all words in a string the default, but by using the operator OR you can specify one term or another
Search: cat, dog generates all the pages that mention "cat and dog"
Search: cat OR dog generates all the pages that mention "cat" and all the pages that mention "dog"
Search: food (cat OR dog) comes up with the terms Cat or Dog along with the word food in Google OR is often replaced with the programming character “ | ” (called pipe)
In addition to simple site search, Google uses a special syntax called “inurl” to let you search the contents of any URL on the net, this will dig down below the main domain into the sub-domains of the site for the content you specify. This is perfect for searching domains with a lot of subs and also perfect for locating useful indexes. Have a look at the examples below.
Try typing the following into your Google address bar
This search term will generate a list of website with indexes of MP3 and WMA files and you can browse and download to your hearts content. But say you want to search for a specific file
Here we have searched for the GoogleEarth application.
Need to find a torrent file? Here I have asked Google to search for all Linux torrents
linux filetype:torrent
But you can replace the “linux” search term with whatever you want. Google provide a handy search tool which you can download to your own desktop have a look at http://code.google.com/p/googlehacks/
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