And what is te best floor for shiny stuff...
Is a mirror an option or plane white?
A mirror is probably too much reflection. The floor becomes the background or backdrop of the object, and I usually prefer something that will contrast with the object. So I usually use a dark colored cloth of some sort. (I buy a couple of yards of the color I need at a local fabric store.)
When using a light tent, shoot your lights (strobes or incancesdents) through the fabric at whatever angle gives you the best reflection in the subject. It is very common to have the main light coming from above and behind the subject.
You will probably need to use small pieces of white paper or cardstock to add reflections under and in front of your subject, depending on exactly what you are shooting. You can look through the viewfinder of the camera and see the effect as you move the card in an out. Sometimes the card has to be right up against the object -- I shoot one frame with the card and one without, and composite them later in Photoshop.
Finally, note that I am hardly a small product photographer, and in fact hate working in the studio. So I'm not the best person to ask. But I am required to shoot this sort of thing on occasion, so I've had to learn some of this stuff.