homeassistant

Entities I strongly recommend naming them like this:

{location}_{type}

For example

main_bedroom_temperature

This way if you change devices, you can swap entity names and everything works. Also YAML code is much easier to read and write.

Devices? That's more difficult to name, but also way less important, IMO. Usually I try to follow the same scheme as for entities, but sometimes I just prefer something else, like the actual brand, date of install...