Just in case i can help anyone, i'll share here how i cured pain in my wrists and neck in a short time with very simple excercises. I realize now that a factor causing the pain was that i used my wrists and neck only for lots off light movements (typing, mousing, turning the head, sitting with wrong posture). These light movements tax these bodyparts but don't strengthen them. I started doing the following (strengthening) excercisces and now, after one month, my complaints are mostly gone.
For the wrists: knuckle push-ups. Just like an ordinary push-up, but resting on the knuckles of your fists instead of the palms of your hands.
For the neck: bridging (described in more detail somewhere on mattfurey.com). Make a bridge (you know, your hands and feet on the floor and belly facing the sky), but now, place your forehead on the ground and get your hands off the ground. This requires some flexibility and neck strength. Until your neck is strong enough it's best to keep using your hands. Hold the position for a while, tightening, not relaxing, the involved muscles and breathing deep. You can also move your head back and forth a bit. The idea is to increase the period you hold this position as you progress.
Another one for the neck: the inverted bridge. Same thing, but with the belly pointed to the floor. You support your weight on your feet and the top of your head, making an inverted V shape.
For the wrists: knuckle push-ups. Just like an ordinary push-up, but resting on the knuckles of your fists instead of the palms of your hands.
For the neck: bridging (described in more detail somewhere on mattfurey.com). Make a bridge (you know, your hands and feet on the floor and belly facing the sky), but now, place your forehead on the ground and get your hands off the ground. This requires some flexibility and neck strength. Until your neck is strong enough it's best to keep using your hands. Hold the position for a while, tightening, not relaxing, the involved muscles and breathing deep. You can also move your head back and forth a bit. The idea is to increase the period you hold this position as you progress.
Another one for the neck: the inverted bridge. Same thing, but with the belly pointed to the floor. You support your weight on your feet and the top of your head, making an inverted V shape.