You may also want to consider alternative keyboard layouts. The most widely accepted design is the Dvorak layout. This keyboard design places the most commonly used letters in the home row, which reduces the distance your fingers must travel and supposedly increases overall speed. Most operating systems allow you to implement a Dvorak layout via software. To see what letters on are which keys, you will need to buy stickers, switch keys, or buy a new Dvorak keyboard.
More radical designs do away with the whole concept of hitting a key to get a letter.
One alternative are chord designs, which usually include just five to seven keys. By pushing combinations of keys, these chording keyboards allow you to generate any character using just one hand. Of course, chording layouts require quite some time to get used to, and cannot be used with standard keyboard designs. No matter what type of keyboard you buy, you should have little trouble getting it to work with your computer. In most cases, you simply need to disconnect your current keyboard, and plug in another model that uses a similar plug.