I show two simple examples. One uses a standard tripod and the other uses just a piece of 2x4 and a bolt. There are any number of things that you can use. Just follow these principles:
1: Adding weight to the camera increases its inertia and dampens shaking.
2: Spacing out the hand grips reduces the effect of random hand movements/
For step by step instructions for this project, check out my Instructables page: http://www.instructables.com/id/How-To-Make-an-Impromptu-Camera-Stabilizer/