Having started five-six new organisations by now, there is in fact a checklist I use these days. The first item is: do I have a salesperson I trust to work with onboard as collaborator? Without this I don't do anything. Viable ideas I am never short of. Then the rest of the checklist starts. But I am on mobile, and not able to easily elaborate right now.
I'd like to thank HN for that. HN gave me a bunch of information/reflex/frameworks to understand how to create a company and how to understand various signals, and my first solopreneurship has been successful for 4 years.
People want a nice little checklist of how to start a business, but that isn't how it works.