As a general rule I don’t do many “regular” listings.
Most are short sales.
When I do handle regular listings, I really try to get a very clear list of duties from a seller.
I recommend that every seller do this.
Just a list which you email to your client of the minimums you expect.
EG:
2 open houses per month.
1 emailed status report every Monday
2 broker opens during the listing period.
professional photos
free back rubs

The point is that SD and sdr are right.
Often the the final problem is the fact that the seller thinks they understand the market and cant part with their higher price point expectations.

Most problems can be solved with money or explosives.
Properties without offers are no exception.