If I were to rate the most annoying thing in a laptop, it would be the touchpad that always messes when I am typing. I believe this will be the case with most of the laptop users. Some laptops provide an on/off switch for the touchpad but if you are frequent switcher then this won't work for you. But as I always say, there is always a way . Touch Freeze is a small utility that stops the touchpad while you are typing thus stopping the annoyance.
If you are an Ubuntu user then you can download it from the repos directly. Use the following command to do that.
[shredder12]$ sudo apt-get install touchfreeze
Otherwise, you can download its source www.kde-apps.org/content/show.php/TouchFreeze.