As Scott said above, lots of light... he's suggesting that the more light there is, the camera will try to compensate by shutting down the aperture, and this is good because it increases depth of field, which means more of your model will be in focus.
If you have a modelling light that has a nice white light, I would use that, and get it up pretty close to the subject, preferably shining from the same direction as you are taking the photo - so you might almost have the light with the camera on top of it. This way you will get fewer shadows.
An alternative is that big yellow light in the sky... preferably when it is not overhead. I have found you can get nice shots when the sun is fairly low, making sure again that the sun and the camera are coming from the same general direction, but obviously not with your shadow falling on the model.
What I would not use is either any yellowy coloured light, nor flash. I would also avoid either textured or brightly coloured backgrounds, so just some plain white paper is better than your carpet, or some darkish wood is OK in my opinion. Remember that the background reflects light in different ways.
Finally, if it is going to risk being out of focus, don't get too close - much better to have the original shot nicely in focus, and then enlarge + crop down the image on your computer.
Keep trying until you start to get something you like!
Interestingly,
here is a review of your camera, take a look at the sample shots (link is right down at the end of the review) of the watch, and see if you can work out how they took that using the macro mode... that's a pretty decent shot, although I understand that this setting may not give good depth of field.