Never been a CTO, but, don't be afraid to give some of your responsibilities to other people. Not sure how else to describe it, what I mean is just don't expect yourself to do everything, you have dev team for coding, etc.

Make sure your developers have everything they need to do their job: like tools, specs, docs, designs, etc.

And don't be afraid to ask questions to your developers, there is no way you will know the product 100%.

That's a message from a regular dev.