Easy way to complete references after importing PDFs?

Hello everyone,

I am fairly new to Endnote. I had done some research on a topic and downloaded some books and articles I want to use in my thesis. However, after importing these PDFs, almost 2/3 of them didn’t get the reference right.

What is the best way to get to a complete reference with the right PDF attached?

Thank you very much!

Depending on how old the PDFs are, they may not have the right metadata to import correctly especially when mixing books, and articles.  Are they importing with the file name in brackets in the title field?  

I prefer to download books from university library or library of congress databases using the connect feature.  If you have a pdf copy, you then drag and drop it onto the complete record.  Articles I also prefer to get from a data base too.