Stopping exactly when it says is key for me, it's easier to go back to something that is in progress rather than returning to something that isn't already in my

Stopping exactly when it says is key for me, it's easier to go back to something that is in progress rather than returning to something that isn't already in my mind. I also prefer a physical timer, there is something nice about it being a separate tangible item that's not a window on the very work space that I'm using.