Even though there still aren’t any mainstream Thunderbolt peripherals, owners of Thunderbolt-equipped Macs should probably install the Thunderbolt Firmware Update to be ready. All Apple is saying is that it “provides Thunderbolt performance and stability fixes,” but given how new Thunderbolt is, it seems likely that Apple would still be squashing bugs. Since this is a firmware update, be sure not to interrupt the update process that starts after your Mac restarts. (Free, 486 KB)
Disable Caps Lock
If you find yourself pressing the Caps Lock key accidentally as much as I do, note that you can disable it entirely in Mac OS X. Open the Keyboard & Mouse preference pane, click the Modifier Keys button, and in the dialog that appears, select No Action from the Caps Lock pop-up menu. You could remap it to another modifier instead, but that might make using differently configured Macs more difficult.