Here is a short list of useful Advanced Search options for Google:
cache:www .example.com Google’s cache of example.com
link:www .example.com List of websites that link to example.com
related:www.example.com List web pages similar to http://www.example.com
info:www.example.com Show information that Google has about http://www.example.com
site:www.example.com List all web pages hosted at http://www.example.com
allintitle:query Restrict the results to those with all of the query words in the title.
intitle:query Restrict the results to documents containing that word in the title.
allinurl:query Restrict the results to those with all of the query words in the URL.
inurl:query Restrict the results to documents containing that word in the URL.
apple * sauce the words apple and sauce separated by exactly one word
Nokia phone $100…300 Search within a range of numbers for a Nokia phone between $100…300
safesearch: sex education Search for sex education material without returning adult sites