A man may be very sincere in good principles, without having good practice.
There are many examples of good practice guidelines on the internet, making it an impossible task to list them all. However, the following are of particular note, and will direct the reader to those guidelines of interest that will provide the level of detail required.
CPNI has a wealth of information covering all sectors of the CNI at https://www.cpni.gov.uk/advice/cyber/Good-practice-catalogue/
Good practice information on industrial control systems can be found at https://ics-cert.us-cert.gov/Recommended-Practices
The UK’s Health and Social Care Information Centre posts good practice ...