You know the feeling. You finish a presentation, walk off, and immediately replay the moment you started rushing through slide four. Or the three minutes where you stared at the screen instead of the room. Or the opening that took two minutes to get anywhere because you spent the first ninety seconds thanking people and explaining what you were about to say.
Most presentation mistakes aren't mysterious. They're predictable, repeatable, and fixable. The problem is that they're hard to see in yourself, especially in the moment when you're too busy presenting to notice what's going wrong.
This guide covers the seven most common public speaking mistakes, what causes each one, and the specific fix for each. Not generic advice about practicing more. Actual techniques you can apply before your next presentation.
Why mistakes persist even in experienced speakers
The uncomfortable truth about public speaking mistakes is that repetition alone doesn't fix them. You can give a hundred presentations and still rush when you're nervous, still reach for filler words when you lose your thread, still default to reading your slides when the room goes quiet.
What fixes mistakes is deliberate attention. Noticing what's happening, understanding why, and making a specific change. That's what this guide is built around.
1. Hablar demasiado rápido
Most people don't know they're rushing. When you're nervous, your internal clock speeds up and what feels like a normal pace to you is significantly faster than what your audience can comfortably follow. By the time they've processed your last point, you're two slides ahead.
Before you present, mark your script with pause indicators at the end of every major point. A two-second pause feels uncomfortably long to you and perfectly natural to your audience. Practice at 75% of your normal speaking pace. Record yourself and listen back. If you're prone to rushing, build deliberate pauses after key statistics or important claims. The pause signals that something just said was worth sitting with.
2. No hacer contacto visual
Looking at your notes, your slides, or the middle distance above the audience's heads sends a signal you probably don't intend: that you're not really talking to them. Audiences disengage from speakers who don't look at them. Trust drops. The room goes passive.
Stop thinking of eye contact as a sustained stare and start thinking of it as a series of brief, genuine connections. Pick one person, complete one full thought while looking at them, then move to someone else. Three to five seconds per person is enough. In larger rooms, divide the space into sections and rotate through them. The practical fix for speakers who default to their notes is to know your material well enough that you don't need them as a crutch. Speaker notes exist to remind you of structure, not to be read aloud.
3. Using filler words
Um, uh, like, you know, so. Filler words are what happens when your mouth keeps moving while your brain catches up. They're usually invisible to the speaker and immediately noticeable to the audience. Enough of them and your credibility quietly erodes, not because of what you're saying, but because of what's filling the gaps between it.
The first step is awareness. Most people have no idea how often they use filler words until they hear a recording of themselves. Once you know your patterns, the fix is uncomfortable but simple: replace filler words with silence. When you feel the urge to say "um," say nothing instead. A brief silence sounds more confident than a filler word and gives your audience a moment to absorb what you just said. Practice this in low-stakes conversations, not just presentations. The habit builds outside the spotlight.
4. Mal lenguaje corporal
Your body is communicating the whole time you're presenting, whether you're paying attention to it or not. Rigid posture signals anxiety. Constant movement signals nerves. Crossed arms signal defensiveness. None of these are the impression you're trying to make, but they happen automatically when you're focused on your content and ignoring everything else.
Start with your feet. Plant them shoulder-width apart and resist the urge to shift, pace, or sway. Movement should be deliberate, used to transition between sections or engage a different part of the room, not a nervous habit. Keep your arms loose at your sides when you're not gesturing. When you do gesture, make the gestures intentional and sized for the room. Small gestures in large spaces disappear. Large gestures in small spaces feel aggressive.
5. Sobrecargar las diapositivas con texto.
Text-heavy slides create an impossible choice for your audience: read the slide or listen to you. Most will read. Which means the moment you put a wall of text on screen, you've lost the room to your own slides.
Apply the 7x7 rule: no more than seven bullet points per slide, no more than seven words per bullet. Better yet, aim lower. One idea per slide with a single strong visual does more work than eight bullets and a stock photo. Move the detail into your speaker notes where it belongs. Your slides should prompt your audience to listen to you, not replace you. If your slides can stand alone without you presenting them, they're doing too much.
6. Ignorar la participación de la audiencia.
Talking at people for forty-five minutes and expecting them to stay present is optimistic. Attention drifts. Phones appear. The passive listening format that most presentations default to is also the format least likely to produce retention, action, or any meaningful outcome beyond polite applause at the end.
Build participation in before you deliver, not as an afterthought. Identify two or three natural points in your session where a question, poll, or discussion would reinforce the content rather than interrupt it. Ask a show of hands. Pose a genuine question and wait for an answer rather than immediately supplying one yourself.
Tools like AhaSlides make this practical rather than aspirational. Live polls, word clouds, and Q&A features can be built directly into your presentation flow so participation feels like part of the session rather than a detour from it. Audiences remember what they engaged with. They forget what they sat through.
7. Apertura o cierre débil
The opening is when your audience decides whether they're paying attention. The closing is what they carry out of the room. Both are disproportionately important relative to the time they take, and both are where most presentations are at their weakest.
For openings: skip the preamble. Don't thank the organizers, introduce yourself at length, or explain what you're about to cover before you cover it. Start with something that earns attention immediately: a specific scenario, a surprising observation, or a question that makes the audience think. You have about thirty seconds. Use them.
For closings: write your final line before you write anything else. Weak closings happen because speakers run out of material and improvise an ending. Know exactly how you're finishing before you start. End with a specific call to action, a question worth sitting with, or a single line that captures what you most want your audience to take away. Then stop. The instinct to keep talking after you've finished is what turns strong presentations into forgettable ones.
Cómo identificar tus propios errores
The hardest part of fixing presentation mistakes is that most of them are invisible to you in the moment. You can't hear your own filler words when you're focused on your content. You don't notice you're rushing when adrenaline is making everything feel normal. You can't see your own body language while you're delivering.
Three things help.
Record yourself presenting and watch it back. Not to be harsh on yourself, but to see what's actually happening. The habits you don't know you have become obvious on a recording. Most people are more critical watching themselves than their audience ever was in the room, which means the recording is almost always more useful than it is painful.
Ask someone who will tell you the truth. A trusted colleague, a coach, or anyone who will give you honest feedback rather than reassurance. "It was great" tells you nothing. "You looked at the screen every time you moved to a new slide" tells you something you can fix.
Work on one thing at a time. If you try to fix your pace, your eye contact, your filler words, and your body language simultaneously, you'll fix none of them. Pick the most significant issue, focus on it for your next two or three presentations, and move to the next one once it's no longer something you have to think about.
Terminando
Every mistake on this list has the same thing in common: it's fixable. Not through vague advice to practice more, but through specific, deliberate changes applied one at a time.
Notice one thing that went wrong after your next presentation. Write it down before the memory fades. Apply one fix. See what changes.
That's the whole process. Over time the list of things to fix gets shorter. The list of things that work gets longer. And at some point you stop replaying the mistakes on the walk back to your desk and start thinking about what you want to do differently next time.
That's when it starts to feel like progress.
