When is the last time you thought about how you enter searches in a tool like Google?
Take a quick look through Google's How to Search on Google article, then go a step further and check out Refine Web Searches.
Making use of advanced search screens can help you hone your search skills!
Google Advanced Yahoo Advanced
Also -- try limiting your search by domain (.edu, .gov, .org, etc.) by typing site:.edu in the box along with your search terms.
These resources allow you to get more information about a website's history and traffic.
Before you use a website -- or any source -- for an assignment, consider:
There are many variations on this technique -- here are links to a few of them.
This video describes the features of Google Advanced Search, which can help you focus your search results on exactly what you need.