The easiest way to run it would be with an Automator command (to which you can associate a keystroke). The fastest way to run it would be with a macro type program like Quikeys, iKey or Keyboard ...

If you want to take it a step further, learning AppleScript and combining it with Automator is a cool way to take your automations to the next level. 5 Automator workflows that I use on my Mac to ...