At home, I have little use for domain-specific search engines---Google usually gives me the right answer. But, at work, Google doesn't have access to much of the information I need. Yes, we have an intranet search, but it is of little-to-no help when I'm looking for a particular bug, ticket or code revision. Firefox has "bookmarklets" which let you trigger a custom search based on a keyword. Though it's less obvious, Chrome lets you do the same thing via its "search engine" configuration. In the "Manage Search Engines" window, enter a keyword and a url and a "%s" for where the search string should be substituted. Then, finding a particular bug can be as easy as typing "b 12345" in the omnibox. I got this tip from Lifehacker.