One of our favorite commands: Wait! Teaching your dog to wait at doors and cars is great for:
self-control and listening skills (I cannot cross that threshold!),
no lunging out of front doors/cars unsafely,
waiting outside the kitchen/dining room during breakfast etc.
waiting outside the garage door because there is antifreeze there,
not allowed in the guest room
waiting outside the bathroom LOL, etc. etc.
Great multi-use command.