I've sat through enough internal reviews to notice a pattern: the deck that gets praised in the room is almost never the one with the most content. It's the one that just looks like someone spent money on it — even when nobody did. Most of that impression comes down to a handful of small, repeatable habits, not talent.

Here are 25 of them, grouped by where they actually make a difference.

Typography Choices That Signal Quality

  1. Pick one font family and stop there. Two at most — one for headings, one for body text. Mixing three or four is the fastest way to make a deck look assembled rather than designed.
  2. Increase your line spacing slightly. Default spacing in most tools is tight. Bumping it up 10–20% instantly reads as more considered.
  3. Never use the default bullet point. Even switching to a simple dash or a thin custom marker breaks the "template" look.
  4. Use size to create real hierarchy. If your title and your subtitle are only 2pt apart, there's no hierarchy — just noise.
  5. Avoid full justification. Left-aligned text with a ragged right edge looks intentional. Justified text in short text boxes creates awkward gaps that read as sloppy.

Color and Contrast Do More Work Than You Think

  1. Cut your palette down to three or four colors, including neutrals. A five-color slide usually means nobody made a decision.
  2. Use one accent color, sparingly. If everything is highlighted, nothing is.
  3. Match your chart colors to your brand palette instead of leaving default software colors in place — this alone is one of the biggest tells of an unfinished deck.
  4. Watch your contrast ratios, especially light gray text on white. It might look "elegant" on your monitor and be unreadable on a projector.
  5. Use dark backgrounds selectively, not throughout. A single dark section slide can reset attention between chapters of a longer deck.

White Space Is Not Empty Space

  1. Give every slide breathing room. In my experience, the single biggest upgrade for a mediocre deck is deleting content, not adding design.
  2. Align elements to an invisible grid. Even three columns that aren't quite even will register as "off" to a viewer who can't say why.
  3. Don't center everything by default. Centered text and centered images everywhere is a common mistake — it flattens hierarchy instead of creating it.
  4. Leave consistent margins on every slide. If your margin is 0.6 inches on one slide and 0.9 on the next, it shows.
  5. Group related elements closer together than unrelated ones. This is basically the entire discipline of visual hierarchy in one sentence, and it's free.

Images and Icons: Consistency Over Cleverness

  1. Use one icon style throughout — all outline, or all filled, never mixed. Mixed icon styles are one of the fastest ways to make a deck look thrown together.
  2. Crop photos consistently. If one image is a tight headshot crop and the next is a wide landscape shot, the inconsistency is more distracting than either image alone.
  3. Avoid stretching images to fit a placeholder. A slightly smaller, correctly proportioned image beats a stretched one every time.
  4. Add a subtle duotone or consistent color overlay to photos if your source images come from different places. It unifies a deck that otherwise looks like a stock-photo grab bag.
  5. Skip clip art entirely. I wouldn't recommend it even for internal decks — it dates a presentation instantly.

The Small Polish Details Nobody Notices Until They're Missing

  1. Keep chart labels minimal. A chart with gridlines, data labels, a legend, and axis titles all fighting for attention looks busy, not thorough.
  2. Round your numbers where precision doesn't matter. "43.7%" reads as more anxious than "44%" in most business contexts.
  3. Use consistent capitalization in headers — pick sentence case or title case and stick with it slide to slide.
  4. Number your slides, but do it quietly — small, low-contrast, bottom corner. It's a small detail, but its absence is oddly noticeable in longer decks.
  5. End on a designed slide, not a blank "Thank You." One thing people overlook: the last slide is the one people stare at longest while waiting for questions. Make it worth looking at.

None of this requires a design background or paid software. It requires slowing down on the fifteen or so small decisions every slide involves, and making them consistently instead of by accident.

If you only have time to fix three things before your next deck goes out, I'd start with the palette, the spacing, and the icon set — those three alone change how a presentation reads before anyone processes a single word of content. What's the one habit in your own decks you already know you should fix but haven't gotten around to?