You can not do everything by your self. At first you are a one person military. But as you grow and make bigger it will likely be time to Delegate, Defer, and Delete. There are folks that are higher on the mundane stuff than you and are happy to do it. Look for methods to outsource.
Add human beings for your team who will assist you grow. Choose humans who have the capability to take your business to the subsequent stage. Find other a hit marketers and notice how they run their agencies.