You really need to spend a lot of your time focussing people.
The team you build is the company you build.
The people that work with you should generally come up with their own initiatives.
Building a company is basically taking all the irrational people you know... Putting them in one building and then living with them 12 hrs a day at least.
The job of an editor is to ensure a consistent voice.
Ultimately, I don't believe that you can build a company without a lot of effort, and that you need to lead by example.