Do you want to make your work at home or internet surfing more healthy? You need to exercise when you do these stuff. To do that you need a treadmill and a laptop desk that can be mounted on it.
To make such laptop desk you need a piece of half-inch plywood, 2 feet of scrap 2×4, circular saw, jig saw and a few 1 1/2 inch screws. It will take only 20 minutes if you don’t want to paint the desk and know how to work with these tools. To attach the desk to the treadmill you can use a bungie cors. It will be very stable after that. Besides such desk will be nice holder for your working stuff even when you don’t exercise.