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)
Single Time Machine Backups
Tired of Time Machine running all the time? You can turn it off in the Time Machine preference pane, but still initiate a single backup by choosing Back Up Now from Time Machine's menu bar icon. Of course, your backup is much less likely to be up to date, but Time Machine won't be taking any resources while you're trying to work.