Everything.pm is a directory of essays, resources, and tools curated and voted on by fellow Product Managers. I've seeded it with over 300 resources, categorized into 40 categories spanning everything from "what makes a great PM?" to "Top PM Podcasts".
This is the playbook I wish I had 15 years ago when I first started marketing my products. But not every strategy and channel works for every product, so it first walks you through defining a unique strategy and then it spits out a unique actionable checklist.