I went to a hackathon at one of Montreal's technology hubs, the Notman house, put on by the creative folks at the Buckminster Fuller Institute. It was a lot of fun and i got inspired to make a laptop stand out of an octahedron.
Sitting at a computer is not great for the body but you can easily do something about it. By alternating you body position while you work, you strengthen different muscles and spread the strain across your body instead of focusing it on just a couple of places. With an Octahedral Standup Desk, you can turn any table, desk or counter into a standup desk. You can also use it to squat on the floor to stretch out your lower back. It fits in a backpack and weighs nothing.
If you'd like to make one yourself, here are the instructions. If you don't have time, I'll make on for you.