Rearranging the Furniture even for Feng-Shui or Moving, let it slide

Over the years, I have moved many things including the whole inventory of a store overnight. In the process I sprained muscles, hurt my back, suffered from splinters and exhaustion. When I read Move mountains with Furniture Sliders about the Moving Men on Lifehacker, it picked my interest. I went looking for similar products and found EZ Moves Furniture Slides which seems to offer a wider range of products suitable for boxes, furniture and even appliances.
The heavier piece of furniture I have is an upright piano for which I always need to hire professional movers. This baby would break my back.
If you are rearranging your space to change the flow of energy around your house, a recommended read is Open the Door to Feng-Shui by Furniture.com.