How do you manage time when giving a presentation, there are a lot of ways of doing that. You can have a clock, a timer like this, put it on the lectern or a table or on the stage. You can use your own watch. You can have a timekeeper in the back. But the easiest way to really be effective at this is to practice in advance on video in front of real people who also are going to ask questions. Here's the problem most people have is they don't ever rehearse.
They have no idea how long their presentation is. So they've created 173 slides and 10,000 bullet points, and they've been slotted 14 minutes for their presentation. They're going through their presentation, they're only on the second slide and they have a minute left and then it's panic time and they're sweating. That's not the time to do it. Another big mistake people make is they think they know how long the presentation is because they're looking at a piece of paper or Reading a computer screen there reading it silently. Well, you can read silently, three, four or five times faster than you can read out loud or talk out loud.
So it's irrelevant how long it takes you to read a document. If you're timing It only matters how long it takes when you're speaking. It's also going to take longer when you're speaking in front of more people, there's more pausing, we're walking around, ideally, or questions or occasional looks of confusion. So the best thing, practice on video in front of people so you know how long it takes to convey your ideas.