After 34 years in the business, including 8 of my own start-ups and more than 200 start-up clients, I've learned that the only real resource worth tapping into is to connect with those who have "done it before" multiple times. Each start-up is materially different. The best way to tap into the knowledge base needed is not through books, videos or other similar materials. The best possible resource is to connect with like-minded entrepreneurs with 'many' start-ups under their belt. And even then, take whatever info you get and morph it for your own purposes.