Drag & Drop Items
Drag and drop a file from the folder that contains it into the middle pane in the zotero interface (where the other items are). Depending on whether the article has a DOI, Zotero should magically retrieve the proper metadata and rename the file with the article or book title! For more, see the "Adding Files via the Zotero window / Drag and Drop" section of the Zotero Documentation.
