I don't know if anyone else has mentioned this yet, but look up Project Oxygen from Google. They did this huge study on what makes a good manager and it is in my opinion very insightful. There is a Harvard business Review article on it that is really good and I'm sure there are some free alternative resources on it as well. Here are the 8 behaviors of a good manager according to the study:

1. Be a good coach
2. Empower your team and don’t micromanage
3. Express interest in team members’ success and personal well-being
4. Be productive and results-oriented
5. Be a good communicator and listen to your team
6. Help your employees with career development
7. Have a clear vision and strategy for the team
8. Have key technical skills so you can help advise the team