Alfred is an excellent OS X utility that lets you launch apps, run quick searches, control itunes and more. I frequently look up docs on jQuery's API so rather than typing "jquery nth-child" in Google then clicking the first result, I wired up an Alfred Custom Search to pull up Google's first result when I type jq [search term].

Search URL: http://www.google.com/search?btnI=1&q=site:http://api.jquery.com/+{query}

Now when I type jq not in Alfred, I land on http://api.jquery.com/not-selector/