Too much of a good thing -- We've heard a number of complaints that indicate you can overtrain a MessagePad to your handwriting. Too much training may confuse the poor little thing, causing recognition to decrease after significant usage. The only solution that seems to make any difference is to toss your preferences and start over. We hope Apple will have some suggestions about this problem soon.
Sleep (and Lock) Your Screen
When you are walking away from your computer, it's fairly common practice to start your screen saver and lock your screen. But did you know that there is a built-in keyboard shortcut in Mac OS X to sleep the screen?
Press Control-Shift-Eject and your monitor sleeps without engaging the screen saver.