I recently read The Power Law by Sebastian Mallaby. There is a section about how Thomas Perkins, the founder of Kleiner Perkins, approached venture capital. His strategy was to "identify the white-hot risks, then find the cheapest way of going after them." Essentially, determine where the startup might fail (e.g. is there a foundational technical breakthrough that's required? Some complex operational execution? A question of market demand? etc.), and maniacally focus on solving for that singular element in the most economically efficient way possible. I very much like this approach to investing and company building. Constraints (i.e. the limited amount of money one has in the bank) force focus and ruthless prioritization.
In the past decade tech entrepreneurs have experienced remarkable market conditions. Money from venture capitalists was seemingly infinite. This created a series of bad behaviors that entrepreneurs will have to unlearn. Mainly, it enabled founders to do too much shit at once without truly understanding and focusing on what was most important to make their business actually work (i.e. what is the white-hot risk?). My strong preference for company building, particularly at the early stages, is to singularly focus on the thing that is mission critical and to tackle that in the scrappiest way possible. I, like every other entrepreneur, have made the mistake of trying to do way too much on more than one occasion. The times things worked best were always when we had a crystal clear focus on the absolute most important thing to accomplish and focused all of our resources and attention towards it.