What are the best steps to take to return to macOS 13 from 14 beta?
best steps to return
Erase and reinstall macOS 13.
Or erase and restore your pre-beta backup.
If you have no pre-beta backups available, and if this Mac contains data that you need, there are no good paths available.
There are not now and never have been macOS downgrades.
You can stay on the beta, or can backup and erase and load macOS 13, and then manually copy over those files from the backup that were not modified by the beta.