My listing presentation consists of who I am, who my company is, and the data (I do a monthly spreadsheet of the local towns: sold, UC, available, and new listings). I explain that I want THEM to have all the information a buyer who is looking for a home will have. Most sellers I talk to seem to have no idea what is going on in the local market or what information buyers are able to get. As another poster said, you have to ask for the listing. You're not there to hang out with them for an hour making friends to invite to a barbeque. Do trial closings, ask them questions and let them talk, and listen to them. I have lists of questions to ask, and I review them before every presentation. Lately I've been doing some presentations with another agent, and I noticed her habit is to do too much selling of ourseves and too much talking about the market, and no asking for their business. She'd say things like "I realize this is a lot to think about, why dont you call us back in a few days" which drove me nuts!! One evening we were doing a presentation and she was going on and on and on, and finally during a lull, I just said "well it's getting late. Do you want us to sell your house for you?" and they said "YES!". Now she lets me do the closing.
One thing I found (accidentally actually, I have a very tiny bladder): if they're very interested, but I just can't get the listing signed, I excuse myself and go into the bathroom. Many times, they just want to talk alone, and neither wants to make the decision if they aren't sure the other does, too. When I come back I say something like "what do you think? are you ready to get started selling your home?". Sometimes that time leaving them alone a few minutes is all it takes.