The Google Quick Reference (see link below) lists some of the more advanced operators you can use. I especially like the following:
- old units in new units: for example 100 euros in forint or 7.6 feet in meter.
- filetype:<type>: for example javascript guide filetype:pdf for javascript guides in pdf format.
- movie:<movie name>: for example movie:King Kong for movie reviews of King Kong.
- define:<term>: for example define:blog for a definition of the word blog
Check out the guide for more examples.



