12/17. The 2017 update to Primo (Search It here at WSU) broke its ability to work properly with Zotero. At this point, journal articles seem to be working (see below), and Ex Libris is working to fix the problem with books.
Options are in order of preference (subject to change as I keep testing this!)
Note: If you email yourself a link to an item through Primo/Search It's email menu, you will *not* be able to add that item to your Zotero library using the URL from the emailed link. Use one of the options below instead.
Books (as of 12/17, before Ex Libris fix - the Zotero translator will not work!)