Unplayable lie - Lost Ball?

You can put another ball into play from where you played your previous stroke at any time. Your ball might be visible, it might not be visible. You don't have to deem it unplayable; you don't have to think it is lost. You don't have to identify it before proceeding. You can just do it. Hit a ball into the boondocks, pause for a mild sweary word and, depending where you are, immediately drop, place or tee up another ball and play it.

If you put a ball into play from the tee and decide to play another under stroke and distance, you can tee it up anywhere on the teeing ground.