If you are like me, you use the search bar in Firefox at the top right to do your search. If you are like me, you also have a number of search engines which you use pretty frequently e.g. Google, Wikipedia, Weather.com, Amazon etc. etc.
Enter Yubnub. YubNub is a cool engine that allows you to search multiple websites for anything from one place. If defines shortcuts for each search engine e.g. If you want to search "Seattle" in Google all you type is "g Seattle" in YubNub. "wp Seattle" does a Wikipedia search. And it's pretty comprehensive. All the search engines I use, I could find shortcuts for. Just go "ls <search engine name>" to search among existing shortcuts. In the rare case that you can't find a shortcut for your favorite search engine, you can create a new shortcut in minute.
Now all you have to do is add Yubnub as your only Firefox search engine. Then go Ctrl+K and type on. It's gonna save you hundreds of clicks a day.