Mistake 1: Too Many Slides
More slides rarely means more information conveyed. It usually means less. When you try to cover everything, you end up saying nothing clearly. Your audience's attention is finite — every slide you add is a withdrawal from that account.
The fix: Ask yourself — "If I could only keep 10 slides, which would they be?" Those are your real slides. Cut everything else or combine related points.
Mistake 2: Walls of Text
A slide crammed with paragraphs forces your audience to read instead of listen. The moment they start reading, they stop hearing you. You're competing with your own content.
The fix: Use slides as visual anchors, not transcripts. Three bullet points maximum per slide. Each point should be 5–7 words — a trigger for what you'll say, not everything you'll say.
Mistake 3: Reading Your Slides Verbatim
If your audience can read your slides faster than you speak them — and they can — you've made yourself redundant. This is the fastest way to lose a room.
The fix: Know your material well enough that your slides are prompts, not scripts. Present the insight; let the slide support the evidence. If you need notes, use PowerPoint's Speaker Notes view — your audience never sees them.
Mistake 4: Fonts Too Small to Read
The "just in case" instinct — packing in more text at smaller sizes — is the enemy of legibility. Anything below 18pt is typically unreadable from the back of a meeting room. Below 14pt is invisible to anyone beyond the front row.
The fix: 28pt minimum for body text. 36pt+ for headings. Test your slides by standing 2 meters from your monitor. If you squint, it's too small.
Mistake 5: Inconsistent Design
Using five different fonts, three color schemes, and random clip art tells your audience: "I threw this together." Design inconsistency signals mental inconsistency — exactly the opposite of what you want in a credibility-building presentation.
The fix: Choose two fonts (one for headings, one for body) and one or two accent colors. Use them everywhere without exception. A template solves this automatically — it's the main reason professional templates exist.
Mistake 6: No Visual Hierarchy
If everything on a slide has the same visual weight — same size, same color, same importance — nothing stands out. Your audience doesn't know where to look first.
The fix: Make the most important thing the biggest and highest-contrast element on the slide. Use size, color, and position to guide the eye: headline → key point → supporting detail. This is the most fundamental principle of slide design.
Mistake 7: Distracting Transitions and Animations
Random fly-in animations, spinning text, and checkerboard transitions are a relic of 2003. They distract from your content and signal that the presenter doesn't trust the material to hold attention on its own.
The fix: Use one transition — consistently. The PowerPoint Morph transition creates smooth, professional motion between slides without looking gimmicky. It's the gold standard for modern presentations because it feels natural rather than theatrical.
Start with a Better Template
The fastest way to avoid most of these mistakes is to start with a professionally designed template. Good templates enforce consistent fonts, colors, and layouts — leaving you free to focus on your content and delivery.