The Community Media Workshop is a great resource for marketers/pr folk.
The offer classes, an annual media guide, and a great website.
The recently refreshed their website with new content, new navigation, and more. It’s a great place to find articles and information of interest.
Illinois Libraries Matter 
Hi, thank you so much for the plug! (incidentally, you can most of our best PR tips now at an updated site, communitymediaworkshop.org/resources.
We were so pleased to be able to send someone to the recent ILA conference (after first learning of it when we were asked to present last year) and hope to be able to do so again–any thoughts on what kinds of communications coaching and training is most helpful to libraries would be welcomed, BTW!)