It's worth noting that there is also DuckDuckGo (a search engine), which has bang expressions for outsourcing results. Just to give some of the equivalents for those listed above: "!gi" for Google Images, "!yt" for YouTube, "!w" for Wikipedia, etc. To be sure, one has to rely on DuckDuckGo for adding the expressions (although I've had success suggesting a new expression before).
There have been a couple discussion posts on this, but let's make it general and collect our tips in one place. It's also a good way to encourage each other at getting better at this - looking for info more often and more efficiently.
So, if you want to find something out, where do you look, and how? Who do you ask?