Because I never read the manual, I was having problems locking the keyboard on my new Blackberry Bold. First, you have to turn off the language switching in the menu to be able to use the old 'Alt-Enter' shortcut for locking the keyboard.
Thing is, with the new trackball, that key combination is a little awkward, and I am so paranoid about dropping the dang thing, that I have been using the menu option for locking.
Jeez, the manual for this thing is literally hundreds of pages, and to be honest, I've never even looked at it. I mean, seriously, why wouldn't I already know everything about using a Blackberry?
So, two key shortcuts I learned today are;
hold down '*', this will lock the keyboard
hold down '#', this will toggle between vibrate and normal profiles