The University of Rochester Libraries has a site license to EndNote so you don't have to pay for it! You'll get free updates as long as you're affiliated with the University.
There are 20 unnarrated videos in this playlist. Most are a minute or less. In 20 minutes, you will have a good idea how this software works.
An additional user guide is available on your computer:
You may want the full version of EndNote if ...
__ You frequently work offline.
__ You save PDFs to your computer and want to link them to EndNote.
__ You'd like to search the full text of PDFs within EndNote.
__ You'd like to find PDFs to match your EndNote references.
__ You'd like to share your EndNote library with other people.