[terryjsmith]

This is spot on. I would add that as a manager, it is my job to foster good relationships with other managers and use those to remove bottlenecks for my team. I spend a good portion of my day on the phone and walking around the office connecting the dots and getting buy-in or compromises and making sure everyone is on the same page about what's being built. On top of that is having a clear "second" who people can go to when you're out to do the same thing.

Another piece is being able to make decisions and stand by them. That doesn't mean never backing down, or always being right, but you'll often make quick decisions with less than ideal information and need to be comfortable with that. You'll be wrong a non-negligible portion of the time, so you'll need to own that, work to fix any issues, etc. and not take it too personally.

As a manager of other managers, I like to tell my team that you're in a good place when work can continue on without you; your job is to push things forward, drive process changes and improvements, message successes up and down, etc.