What's the best way to leave some excess on a NM cable in a wall or joist space?
You can continue to do what you are doing or wrap it with tie wire or with zip ties. Just some way of keeping it from damage during the rest of construction.
The main thing is not to connect the circuit inside the panel. Make sure there is no exposed wiring that come into contact in the panel. Do not strip back the outer cover so the ground wire is not exposed. Use wirenuts on the ends of conductors. And always label it well enough so anyone accessing your panel knows what the extra circuit is for.
Or if the circuit is feeding to other devices that need to be hot. Make sure you have a method of locking out either the entire circuit or that part of the circuit that is not being used at the time.
Good luck and stay safe.