From: How To Hire an Assistant by @JasonFried (edited)
This is a problem with job listings: They don't describe an actual day's work. They're heavy on general skills but not specific actions.
We decided to go in a different direction. Instead of a list of skills— this software, that many years of experience, "team player," etc.— we wrote a list of 26 things that this person would have done in a week had he or she been working here.
The list included things such as "Booked two hotel rooms and two flights for out-of-towners"; "Packed up and shipped out about five copies of Rework to various people"; "Coordinated with Abt Electronics to schedule installation of four flat-panel TVs"; and "Researched and recommended local floral arrangers for weekly flowers for the office."
This way, whoever was applying would know exactly the kind of work he or she would be expected to do. (You can read the job posting here).