The Get More Out of Google Infographic Summarizes Online Research Tricks for Students
My favorite Google trick is to use Google Books to search for citations and useful quotes. When I'm writing papers or doing research, I usually have a bunch of quotes that I've scribbled down somewhere, or thrown in my paper without citing it, and when I have to go back during the editing process and fill in all that information is super useful to be able to search google for the exact page number. It's also useful to help find themes within books. For example, in a current paper I'm working on I wanted to find all of the times that Locke talks about slavery. So I pulled up the edition of the book I had using the ISBN, and searched for the word "Slave." The preview feature doesn't give me all of the text, but it gives the page numbers and that is enough for me to go to the book and look up all the useful references.