Preach it Brother UTecht

Jeff did a very good job focusing in on a few key tricks to search google. After a bit of digging I would like to add a little trick for Wikipedia. 

1. Find the the search box in the top right corner of Wikipedia.  
2. Click the spyglass with nothing in the search.  (It will take you to an advanced search screen.)
3. Enter this in the search box  
                   Washington & incategory: B-Class_articles
4. Now change it to:
                   Washington & incategory: C-Class_articles
5. So you can search the article for the keyword "Washington" and filter for all articles with a specific class.  Here are the rest you can use
   
   incategory: A-Class_articles
   incategory: B-Class_articles
   incategory: C-Class_articles
   incategory: FA-Class_articles
   incategory: GA-Class_articles
   incategory: Start-Class_articles
   incategory: Stub-Class_articles
   incategory: Unassessed-Class_articles
   
6.  Of course you can replace the word "Washington" with anything you are searching for like "Korean War" "Unicorns" "My Little Pony"