Do you subscribe to Seth Godin's or Simon Sinek's posts?
This is a series of similar very small posts, but instead of being inspirational, they talk about SaaS metrics and how to use them.
Here's an example:
"At Growth Ceiling MRR your current marketing spend is required just to prevent your SaaS from shrinking.
As your business grows, eventually the back door will have as much traffic as the front door. Aim to be profitable at that point. Try to keep the Growth Ceiling MRR 20-50% higher than your MRR goal".
