This is an image from my first attempt at setting up my own lighting, and doing a planned shoot ( instead of just going out and shooting birds :) ). It appears to be suspended in mid-air because it is.
In fact, I shot this wooden knife image before I even had a proper horizontal surface available. Instead, this was supported by a wire attached to a horizontal beam. The wire and supporting tape on the knife were then removed in the GIMP.
This was a crude effort; I don't think I even used a tripod; but I got some decent results just by starting with a 3 point lighting setup, experimenting with the lights, and paying attention to the results.
You can find product designs based on my wooden knife shots and other object photos in my zazzle store. If you have a product in mind but don't see it, just leave a message on the store wall or product page and maybe I'll design it for you!