Strategies to stay focused on reaching product market fit, by Jason Freedman:
Delay everything that is not absolutely necessary to reach “user delight”: your pre-product startup is a “time-ticking bomb” without it
Solve problems quickly and only when they arise: Jason had a shoebox as a bookkeeping system, till the day he needed to raise cash; he then paid a bookkeeper
Outsource as much as possible to work on your product: healthcare, taxes, etc.