Agency owners who do everything themselves have fragile businesses. The fix: become allergic to work. Say no to tasks you used to do, delegate hard, build systems, and let the business run without you in it.
If you're an agency, that only works because you are involved in everything. You don't have an agency. You have a fragile system. One of the things you need to do is you need to start becoming allergic to work. Yes, allergic to work. Which sounds very strange because hard work got you to where you are today. But in order for you to scale and build a business, you have to start saying, no, I can't do this because I'm allergic. I can't. And I need to get somebody else to do this. I need another system. I need a tool to do this for me, whatever it might be. You need to start delegating and start expanding.
