I think understanding people goes a long way toward working cohesively and maintaining good relationships with them. Two books that I found really helpful are How to Win Friends and Influence People by Dale Carnegie and It’s Your Ship by Michael Abrashoff.
A few cliff notes from my experience:
People are often driven by their emotions at the expense of logic. Be quick to forgive this. We’re all that way sometimes. Part of the human condition.
Use knowledge of the former to your advantage. People like to be trusted and given ownership of their job. Focus on clearing obstacles and enabling your team rather than micromanaging their work. If they learn to trust you, they will be much more prone to come to you for help before things have gotten out of control.
Balance criticism with praise. You need the job done right but your main goal is to help your team succeed. Their success is your success. Have hard conversations with them when necessary. Be direct but be kind. Have these conversations in private. As much as people need to know when they’re not performing as expected, they also need to know when they are. And, I would argue that they need this more. When someone does something right, tell them and mean it. It’s ok and sometimes even good to do this publicly. “John, that feature you implemented was great and your code quality was top notch. Thanks for doing that.” It doesn’t have to be more complicated than that.
Take responsibility for your own failures. You’re not perfect. None of us are. You will earn a lot of respect by being willing to own your mistakes, not to mention it shows you’re a person with integrity and at the end of the day, it’s worth more to know you can sleep at night because you did the right thing even if was hard.