You can use these collections to search for your topic of interest and get started by finding a broad overview of important background information, including vocabularly that can be used as keywords when searching a database; and bibliographies in articles to find other sources (both primary and secondary).

• Look for clues in the URL: .gov, .org, .edu;
• When in doubt, go back to the primary page to find out more (www.mainpage.com/subpage...check out the mainpage to see what it's about);
• When searching, try including the name of a well-known organization or museum, such as the Smithsonian;
• Evaluate, Trust...Verify: once you've evaluated information and decided that it's probably trustworthy, it's a good idea to verify facts and dates through other sources.  

• Check out some Advanced Search Tips from Google.to find out how you can use search operators to get more relevant results.
• You can use the 'search tools' feature or the 'advanced search' feature of Google to help filter your results.