What lifestyle choices are helpful in reducing the risk of or slowing cognitive decline?

1. Regular daily physical exercise.
2. A healthy diet: for example, the MIND diet: low in fat and sugar, high in vegetables and fruits, and regular hydration.
3. Be mentally active.
4. Participate in social activities.
5. Get adequate sleep (7-8 hours nightly).
6. Manage stress.
7. Limit alcohol and avoid smoking
8. Perio...

The same that is needed for preventative general health, there are no evidence-based lifestyle measures unique to cognitive impairment.

Here is a fact sheet with citations from the Physicians Committee For Responsible Medicine.