Have you come across good resources for thought leadership content related to industry product marketing? If so which would you recommend?

Certainly Sharebird, which is always good for a wander around Q&A's and other content. There are a few podcasts I really like, like Product Marketing Insider, the Product Marketing Experts and Product Marketing Life. There's some good stuff in Forrester's Sirius Decisions about Industry Marketing but it's also helpful to follow certain influential folks in an industry, even if they're not marketers, to soak in the language and topics that matter. Especially at senior levels, industries are smaller than we think they are from a people perspective - all the IT architects in the big banks know each other, the community of drug safety executives is pretty tight, etc.

Unfortunately, I really haven't. Find people who've worked places where you see great industry expertise. Talk to them. Talk to customers. 

Read Crossing the Chasm. Again. 

Ooh, fun one. Alex and the Sharebird team are telling me that there's a 300-character minimum answer. Now we get to pick on them a bit.

"Alex, I thought that one of the greatest strenghts of PMM was synthesis and simplification! Why can't I be super concise and pithy here? ARE YOU NOT ENTERTAINED!?"

Okay, let's see if that's 300 chars yet... ...