Apple has released MacBook Pro EFI Firmware Update 2.8, which specifically targets 15-inch models released in late 2008. This update resolves a graphics issue that may cause the internal display to flicker. To ensure you get the firmware update only if it’s necessary, we recommend relying on Software Update; if the update doesn’t appear for you, it’s not appropriate for your Mac. (Free, 1.8 MB)
Avoid Simple Typos
If, like me, you find yourself typing 2911 in place of 2011 entirely too often, you can have Mac OS X (either Lion or Snow Leopard) fix such typos for you automatically. Just open the Language & Text pane of System Preferences, click the Text button at the top, and then add a text substitution by clicking the + button underneath the list. It won't work everywhere (for that you'll want a utility like Smile's TextExpander), but it should work in applications like Pages and TextEdit, and in Save dialog boxes.