Ask IH: What are the best resources for learning sales and marketing for SaaS applications?

This question is being asked based on this post: https://www.indiehackers.com/post/fcb78fe810

I thought it would be interesting to ask a similar question that I have a burning desire to learn about.

There was some great responses in the previous thread and wanted to see if we could expand on that into the sales and marketing side too. I feel building the product is only the start of the journey. Appreciate any replies!