Shout at them
Touch them gently on their shoulder
Approach them in the dark, noisy area
Go ahead and help them – if they don’t like it, they’ll say so.
Ignore them until you have time for them. Serve the easiest customers first.
Always serve customers with disabilities away from other customers.
Ask, "May I help you?"
Assume they need help to get around.
Once they are comfortable, move their assistive device out of the way.
If helping them, it is ok to leave them in an uncomfortable or awkward position, for example, facing a wall.
Ask before you help. People with physical disabilities often have their own ways of doing things.
Older people are all hard of hearing.
Avoid touching a service animal without permission.
Support people are paid employees of customers with disabilities.
People who are blind cannot see anything.
Their disability might affect how they interact with you, and it might not.
They all use assistive devices like a wheelchair or a hearing aid.
Their disability affetcs them with the same severity at all times.
All people with the same disability are affected in the same way.
Exaggerate speech and gestures
Assume they understand what you are saying
Use plain language
Here's an interesting quiz for you.