Avoiding busy places that are confusing and could cause disorientation.
Keeping a record or diary to see if there is a pattern or trigger that leads to situations where the person is more at risk of going missing.
Telling neighbours and local people that work or live at places that your family member may go about the situation so that they understand if the person appears unexpectedly, let them know who to contact.
Develop a safety network of people who could help keep a look out and who understand the person’s predicament before an emergency happens. This may be particularly useful if the person at risk lives independently.