Some of the nice practices to write a use case are as follows:
To emerge as a legitimate use case, the use case ought to offer some price returned to the actor or stakeholder.
The practical and non-useful necessities must be captured appropriately within the use case.
The use case must have one or more alternate drift at the side of the principle go with the flow.
The use case have to only describe what the device does and no longer how it is done because of this it's going to not describe the layout. It will act as a black container from the point of view of an actor.
The use case should now not have any, i.E. It should be stand alone.