Bluetooth keyboard: Close an application card [webOS 3.0.5]
This tip is only for devices running webOS 3.0.5 or higher
With the webOS 3.0.5 update, the ability to utilize a Bluetooth Keyboard with your TouchPad was greatly improved with the addition of keyboard shortcuts to allow copy, cut and paste, as well as the ability to navigate through your open cards with the arrows keys while in card mode. It seems like one of the only reasons left to need to touch the screen would be to close an apps as well. Actually, webOS 3.0.5 took care of that as well.
As long as you are in card view (if not, just press the key to minimize your application), you first need to use the right and left arrow key to bring the app you want to close in focus. Then, just press the Control and Delete keys together and the card will fly off the top of the screen. If you need a way to remember this, just think of the Windows Control-Alt-Delete combo, just without the Alt key!