How are you able to rest?

When I’m working or doing something, everything feels fine — but as soon as I sit down for five minutes to rest, it feels like hundreds of little electrons are racing around in my brain, and I feel the urge to do something, to keep my mind occupied. Five minutes of rest and doing nothing feels more like punishment than a reward. What does it feel like for you when you sit down for 5–10 minutes to rest and do nothing? What do you do to relax?