Hello Andreas
Welcome to the OH Community.
This depends on how many bindings, items, rules … you have.
You’ll find some threads regarding naming conventions… For example
Personally, I’ve build for every binding its own .items File so I know where I can find my item (e.g. groups.item, weather.item and so on).
Same procedure I’ve done for my rules (lighting.rules, heating.rules, rollershutter.rules)
For the items itself it depends - as mentioned above - on how many items you have, or you plan to have.
Maybe its enough to name it like light_livingroom. Maybe you need some more information in it: GF_LF_Light_Ceiling (Groundfloor Livingroom Light Ceiling) for example.
I recommend to take a blank piece of paper an start to create your naming convention.
let us know, if you need more input.
regards
Michael