When you go on vacation, even if the plane has Wi-Fi, don’t use it! Positive psychologist Michelle Gielan has found that travelers need 12 to 24-hours to get the health-boosting benefits of complete relaxation. And if you wait until you reach your destination to unplug, you’re essentially shortening your trip. So the second you get on the plane, start to unwind. That means all activities should reflect your vacation mindset. You’ll get into relaxation-mode more quickly.