First of all, seller should be interviewing several people to compare.
Secondly, I always come prepared with a written Marketing Plan that outlines ALL of the marketing that will be done.
I use Showings.com for appointment making and every appointment and agent feedback from showings is automatically emailed to the Seller....constant contact.
I am personally a Marketing Agent and happily co-broke with other agents. I may never personally be showing the house; it is my job to get many Realtors in to show the house.
Feel free to call with other questions...happy to discuss with you.