A friend of mine and I were sharing tips on blackberry tricks the other day when he showed me some shorcuts for Cut, Copy, and Paste (see immediately below). He found a  list of other shortcuts and e-mailed them to me so I figured I would post them here for others to use as well.

Cut, Copy, and Paste
You can also find other similar commands in the typing section below.
• To cut highlighted text when typing, press the Shift key and the Backspace/Delete key. 
• To copy highlighted text when typing, press the Alt key and click the trackball. 
• To paste highlighted text when typing, press the Shift key and click the trackball.

See below for even more shortcuts...