Haven’t done any of these for a long while.  Spent a lot of time thinking and reading (tons of reading).  All of which can be consolidated into three questions for every startup:

What is our business?

Who are our customers?

What do our customers value?

And if that’s not enough I think I’ve finally found a decent reference for our beloved #JFDI.

https://kindle.amazon.com/post/Q9TDG0F1LM6M from the book The Personal MBA.