Use the big muscles in the shoulders and upper back to enable the hands to drop onto the keyboard taking advantage of the weight of your arms to strike the keys or move the pointer. Program your keyboard if possible to reduce overloading one hand. Use function keys in lieu of the pointer when possible, or programs with hot keys and macro keys to save keystrokes. Use the least amount of force necessary. Most keyboard users hit the keys 3 to 4 times harder than is necessary to engage the key mechanism.
Excessive force is one of the main contributors to overuse symptoms and problems.
Try to develop a smooth rhythm when typing, and be aware of when you begin to wail away at the keyboard and try to slow down and lighten up. Minimize wrist movements. To press a distant key, move your whole hand to position your finger over the key. For instance, twisting the wrist over to reach for the return key is a real hazard. It can pinch tiny sensitive nerves and result in nerve or tendon problems.