Tired of typing and accidentally changing the cursor position? A little known trick in KDE enables you to disable the touchpad. It comes back after a configured amount of time.
1) Install kde-config-touchpad
2) K -> Applications -> Utilities -> Touchpad Management
Now you are able to configure the touchpad. You can select "Automatically turn off touchpad on keyboard activity".
This means that whenever you are typing, touching the touchpad will no longer cause you problems. After a short delay, once you have stopped typing, the touchpad will return into service.