@ pecenipicek
Interesting, because if your camera uses even half-sane exposure times (like, say, 1/60th s), even one with terminal Parkinson disease could take decent enough shot.
If your camera only has automatic control and you don't want to use the flash (as is often case with this kind of subjects, reflections are BAD), you have to find a place where there is strong lighting, preferably ambient (indirect). Outdoors with a cloudy sky is great. Good lighting makes the automatic system drop down the exposure time and decrease the aperture, which both increase the sharpness of the image.
If you can't increase the amount of light, you can try to find a setup to increase the CCD cell sensitivity. This, however, also increases the amount of noise in the picture - often quite substantially, so this is usually the almost last resort...
If you have a manual control on your camera, even if it's half assed as they usually are on small digi cams, learn to use it. Generally, use as short an exposure time as possible, and as small an aperture as possible. If the stability of your hand prohibits you using "long" exp times such as 1/20 s or even 1/10 s, use shorter exposure times and bigger aperture.
One more nice trick. If you have trouble pressing the trigger of the camera and keeping the camera steady meanwhile, you can try and set the self-trigger on to, say, three seconds. That way you can press the trigger, keep the aim and perhaps support your hand on to something, and when the auto-trigger takes the picture, your fingers don't need to move. I sometimes use this method when the lighting is poor but I definitely don't want to use the flash... I've got decently stable pics at 1/8 s, sometimes.
You
shouldn't have any problems with exp. times at about 1/60 s. It's small enough a time that even with trembling hands the pic would be rather sharp. But like I said, if you use automatic control and set the flash off, and the lighting is poor, the automatic will set the time on too big, resulting on trembling pics like yours. In your case, you can actually safely take a bit under-exposured pictures and edit the lighting on computer, if you just can find the manual controls of your cam.
...Of course, if the camera is old enough and bashed enough, it won't work as it should, and you can't get good pictures.
And if you know anything about photography, this message is utter waste of time, but all the same... I can't know what your knowledge level is exactly.
