I’ve always said that nothing gets you a bad review from training feedback faster than running over on your time. If you promise students they will be finished with class at 5, you’d better be finished by 5. (Before is even better!)
These tips are fairly obvious, but something I’ve seen a lot of people struggle with, especially not tying how clearly you give them instructions for hands-on exercises with it taking them longer to do.
The one thing I will add is that to manage time like a wizard, you need two things. You have to know the content inside and out, and be able to quickly gauge your audience. You need to have an idea of how long each section will take with that class, and know where you can make up some time if you’re running behind, or where you absolutely cannot cut it short. That only comes with lots and lots of practice.