Google is a great tool for finding data. However, for more reliable data, you may want to stick with government or organizational websites. There is an easy way to do this in Google. Simply add site:gov or site:org to your search and Google will return only government websites or only organizational websites.
These links are merely starting points to get you thinking about the types of places you can find data. You are by no means restricted to these sources. Email us or stop by the library if you have questions.