You don't need to make the structure complicated, in fact you shouldn't. All you need is for every employee to know who their manager is.

One of the keys to focus, and why I said cofounders that aren't friends really struggle, is that you can't be focused without good communication.

Most good founders that I know at any given time have a set of small overarching goals for the company that everybody in the company knows.

If you pivot, do it fully and with conviction. The worst thing is to try to do a bit of the old and the new-it's hard to kill your babies.

Companies that I've been very involved with, that have had a very bad first hire in the first 3 or so employees never recover from it.

If you can just learn to think about the market first, you will have a big leg up on most people starting startups.

... you can think about that for everyone you hire: will I bet the future of this company on this single hire? And that's a tough bar.