I roam around the office when I get bored.
My office where I work has nothing against me just roaming around the facility, wherever that might be.
So I get up and go exploring. But usually I just wander around and smile and talk to other people when I need a break.
And at least my office allows me to go outside for a bit even if I'm not on lunch break.
My office actually recommends for us to step outside when we're done with work and have nothing else to do.
It has helped us to be more productive and cheerful in our work to step outside and get a breath of fresh air.
I wish all offices did that as actually more work would get done.