It’s not staying hydrated, eating well or even handwashing (although those are all important, too) ― when New York City emergency room physician Dr. Calvin Sun travels, his No. 1 priority is quality sleep. There’s no denying that traveling has extensive health and mood benefits , but making sure you get proper rest while you’re away is key to enjoying them. It’s not exactly easy to do: A 2023 study found that only 18% of hotel travelers reported “excellent” sleep while they were away. Sun knows