For a manager that was a developer, this is one of the hardest things to learn. Knowing how and when to delegate properly.

When I first took on a manager role, I for sure made this mistake. Anything hard had to have me fully involved. Grunt work was definitely given out, and yeah, I ended up being stressed out far too often.

I think it's important to have manager training for new managers. Somebody to whisper over their shoulder and say, "give them a shot, trust them on this"