Much of the stress that people feel doesn't come from having too much to do. It comes from not finishing what they've started. Everything that isn't where it should be is an open loop, an incomplete, a distraction that slows you down. It will dull your effectiveness. You've got to dig into the mess and put those things to rest.
Productivity is about completion.
They've cleared up all of their to-do piles, closed up transactions, renewed old promises with themselves. My most basic suggestion is that people should do that more than just once a year. On their runways, people typically have enough stuff to create 300 or 400 hours of work. Once you've taken inventory, you can start to make sense of your runway. In weird time, no one gets 2 hours to do anything.