alias cppwd='eval "echo `pwd` | tr -d \\\\n | pbcopy"'This copies my current working directory to the OS X pasteboard so I can Cmd+V it into another terminal. Often I want several terminals open in the same directory at once.
alias burn='drutil burn -noverify'This one lets me type
burn mydisc.isoto burn an ISO disc image to CD or DVD without having to open Disk Utility.
And a variation:
alias vburn='drutil burn'This does the same as the other but also does the disc verification step.