Pay attention to the type of resource you are using, as it dictates what citation format to use.
Print materials (books, magazines, newspapers) are straight forward – use the corresponding template on NoodleTools or follow directions on Owl at Purdue for Citing Books or Periodicals.
Websites not found through the library are also easily cited using a citation generator like NoodleTools. Just be aware of how those websites came into being. If the information is tied to a university or organization you can find an address for, you can probably trust what you find more than someone's Jane Eyre fan page on the blog-o-sphere. Use the CRAAP test to decide what is acceptable!
Databases get complicated. E-books, Journal Articles, Newspaper Articles, and Encyclopedic entries all live on databases, so when you go to cite, figure out how the information was originally published. For example, if the original resource looks like it has the words "Volume" or "Issue" (or their abbreviations) in the description, it was most likely published in a Journal. When you go to use NoodleTools and start to make a citation for a database, it will ask you for the original format of the information.
With any of this, if you are confused or don't know if what you have done is correct, don't be afraid to ask a librarian!