Most accessibility work fails the same way. It gets treated as a checklist bolted on at the end, owned by no one, audited once. The teams that actually ship inclusive products treat it as a posture instead. They assume a real range of people will use the thing, and they design from that assumption forward.
You don’t need to memorize every WCAG success criterion to do this well. A handful of habits catch the large majority of real-world failures.
Start with structure
Most serious accessibility problems are structural, not cosmetic. A screen reader moves through a page using headings, landmarks, and semantic elements. If those are missing or misused, no amount of color contrast saves the experience.
Use real headings, in order. Use buttons for actions and links for navigation. Label every form field. This is unglamorous, and it resolves more issues than anything else on this list.
Make it usable without a mouse
Tab through your own product. If you can’t reach every control, operate it, and always see where focus is, neither can a large group of your users. Visible focus states are not optional, and removing the default outline without replacing it is one of the most common ways teams quietly lock people out.
If it doesn’t work from the keyboard, it doesn’t work.
Respect contrast and color
Text needs enough contrast to be read by someone who isn’t in ideal conditions, which is most people most of the time. Meet 4.5:1 for body text, and stop relying on color alone to carry meaning. A red field and a green field look identical to a meaningful slice of your audience. Pair color with an icon, a label, or text.
Design the error and the edge
Accessibility lives in the unhappy paths. Form errors that announce themselves, messages tied to the field that caused them, content that survives a 200% zoom without breaking. These are the moments where an inaccessible product stops being inconvenient and starts being unusable.
Honor motion preferences
Some people get physically ill from large motion. Respect the reduced-motion setting, keep essential animation small, and never tie critical information to movement alone.
The habits worth keeping
- Semantic HTML before ARIA, always
- Headings in logical order
- Every interactive element reachable and visible from the keyboard
- 4.5:1 contrast on text, and meaning never carried by color alone
- Labeled fields, and errors that announce themselves
- Reduced motion respected
None of this requires heroics. It requires deciding, early, that the range of people using your product is wider than the range building it. Once that’s the default posture, the checklist mostly takes care of itself.