Okay, here goes… my most embarrassing moment as a speaker. I was in my early 20s, fairly new at public speaking, and probably assuming that anything I had to say was interesting. I had been asked to speak for 30 minutes, so I dug in, did my research, pulled together some notes—and spoke for one and a half hours. It was just awful. People walked out. I wanted to die, but I had no idea how to wrap it up, so I trudged all the way through to the miserable end. That memory still makes me cringe.

The ability to keep it short and stay within the allotted time is one skill many public speakers fail to take seriously. Perhaps there is an assumption that once you have the floor, it’s okay to take as much time as you need to say whatever is on your mind. Well, that’s the presenter’s equivalent of a squatter, but if you’re there with a real commitment to your listeners, your ability to deliver the core message with clarity and effectiveness will override the tendency to cram as much content as possible into a limited time period.

Rambling and going over time demonstrates a lack of preparation. Knowing the material like the back of your hand doesn’t automatically translate into an ability to express it well. To keep it short, you have to know how you’re going to say it. Going over time demonstrates a lack of rehearsal. If you’ve never run through your speech out loud, you have no idea how long it will take. There is no other reliable way to know. Finally, going over time demonstrates a lack of attention. Public speaking requires multi-tasking, and one of those tasks is to manage your time. Losing track of time might be a good thing if you’re the listener, but not if you’re the speaker. Here are three tips to help you keep it short and avoid going over time.

First, clarify your message. Can you summarize your presentation in one sentence? What are the three crucial points you must convey? If the speaker before you eats into your time—and that will happen—or your boss interrupts with questions that must be answered—and that will happen—that clarity and structure enables you to adapt, cover the important information and still finish on time.

Second, rehearse your presentation out loud. Reading over the material isn’t the same. What looks like five minutes worth of notes can easily turn into 15 minutes of speech, and what looks concise as a bullet point can end up being an incoherent ramble. You don’t want to discover those problems for the first time during the performance.

Third, time stamp each section of your presentation and devise a way to keep track of time when you’re at the podium. Even if we happen to see you place a watch or a timer beside your notes, something inside us relaxes and feels grateful because we know you respect our time and you’re taking responsibility for the privilege of having our attention.

Inexperienced speakers often worry about how they are going to fill the time they’ve been given. Going over time is the more likely problem. Anyone, certainly any subject matter expert, can fill the time—and more—but it takes real skill to keep it short. That skill takes work, but it’s worth its weight in gold.

When you show up prepared to be concise, you communicate with enhanced clarity. You deliver your message more effectively. You elicit feelings of respect and appreciation from your listeners. And you project an image of authority, command, responsibility, and expertise.

For more information to improve your speaking skills and some exercises to try for yourself, click the link below to download the free booklet and video series, The Sound of Success.