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.

In the early days of a startup, people's compensation is whatever you negotiate with a founder and it's all over the place.

When lack of structure fails, it fails all at once. What works totally fine from 0-20 employees, is disastrous at 30.

Facebook has this famous poster that says move fast and break things. But at the same time they manage to be obsessed with quality.

It's difficult to get large groups of people, to the extreme levels of focus and productivity that you need, for a startup to be successful.

Share results (financial and key metrics) with the company every month.

The best founders work on things that seem small but they move really quickly. They get things done really quickly.