Most things are not as risky as they seem.
Stay focused and don't try to do too many things at once. Care about execution quality.
So you should always stay on top of people's vesting schedules.
Every thing at a startup gets modeled after the founders. Whatever the founders do becomes the culture.
Most great companies in tech have been built by personal referrals for the first...at least 100 employees and often many more.
So always keep momentum, it's this prime directive for managing a startup.