The following videos demonstrate some interesting setups where as always light plays a hugely important role. The first example below is that of creating the Bokeh Effect. This is achieved using a long lens to set the background out of focus. The background has a dark card / velum lit from behind with a number of holes punched in it to allow light to stream through. Capturing an image of an object good and sharp in the foreground with the Bokeh Effect in the background can create some interesting effects. The addition of gels or coloured acetate sheets can add that extra dimension. Perhaps experimenting with a number of coloured acetates could generate a really nice effect. The addition of a reflective surface adds some really nice reflections into the mix both from the foreground object and the light streaming into the scene from the background.
Another interesting effect can be created with a zoom lens with a slow shutter of a few seconds. Varying the zoom over the time of the exposure to the imaging sensor generates an interesting blurring. You will see that the scene is initially composed with just one side on light, though the resulting exposure is a little dark, hence the addition of some additional lighting to the front of the subject solves this.
A fairly recent previous post looked at light painting, mainly from the perspective of a person creating shapes using a torch or a mobile. The video below is a different view on light painting where objects are illuminated with light. Varying the placement of the light, from back, front or even just from the top down creates quite an array of different shots.
Given that one can use black card in the production of the Bokeh Effect from the first video above another nice composition to try out is to photograph a wine glass making use of a few black cards to control the lighting / reflections of the scene.
If you are perhaps doing a good deal of product photography then you may find something like a Lastolite Cubelite to be of use, so that you can have nicely controlled soft lighting of the product you wish to capture.
Folding up one of these Cubelites can require a bit of practice.