The "how" is more important than people usually guess. You can get higher quality results by using tools such as exact matches and searching by date, over a naive Google for basic search terms.
One technique I use often is inspired from "stemmatics", I've got a short write-up with worked example on G+. Another example is my results for this question on LW.
Another useful technique is knowing how to exclude some search results; NOT operators can be incredibly useful, eg when one of your search terms is very common in a domain not related to your query's domain.
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?