Things my agent did:

* hire and manage a staging company

* hire and manage a photographer

* print and distribute printouts

* hire and manage cleaner, landscaper, other various people to get the house ready and appealing

* use personal network to get the word out to other agents

I could have done most of this on my own, but I'd be cold calling random contracters. My agent had relationships, got the work done fast and at good price. Also I'm convinced all their work added at least 20% to final selling price. Maybe more.