Try to get a tripod, or a solid surface to set the camera on. Turn off the flash, and use the solid surface to compensate for the high exposure time. Use the timer if you must, your finger pushing the shutter button might actually move the camera while you are taking the pic. I had to get a remote for my film camera when I was stopping the lens down to take some fairly long shots (1/60th- 1s) with my tripod. A timer will work as good, but you have to be careful if your overhead light is a fluorescent. Antoher thing I am not sure about is if you can adjust aperture on simple point-and-shoot cameras, but if you can, it makes for some interesting pictures...