1. Don't try to change your people. They are who they are. Work with their strengths. If you can't deal with who they are, you'll need to work on getting them off your team.
2. Pay attention to your employees' careers. You should be training them to see the broader aspects of what they're working on. You should have a career path in mind for them. Some may want to do what they're doing for the rest of their lives. But you should be looking for the ones who will eventually want to move up or sideways, and you should help prepare them for that.
3. Remember that if you're successful, it's because of the work they do. Don't forget that. You aren't successful all by your little lonesome.
4. When you give them something to do, give them a result. Don't micromanage the way they do it. Certainly standards have to be applied, regulations complied with, etc. But as much as possible, let them work toward the goal.
5. Your authority is in your title. It's in black and white. You don't need to prove it all the time. You don't need to fear challenges to your authority: they're stupid and you can't lose them.
6. Finally, this one is tough, but be aware of the difference in your relationship now. There are some jokes that will not go over like they used to, because although you are still who you are, you are now also boss. Neither you nor they can forget that, and shouldn't. Otherwise what would be the point of making you boss?