You know, I'm always trying new techniques, new ways of getting my point across, and I'm not always sure about whether something new is going to work or not, so I'm constantly being put in the same situation you're in now.
I'll tell you what I do when I'm going to try something new. You know those calls you run where you know there's no way you're going to be able to sell them anything, you just want to do your job, get out and get on with your life? That's when you try your new stuff. I figure, what the hey, I'm not going to sell it anyway, so why not try something new? So maybe on the next call you run, when it's obvious they're not going to buy anyway, you can try some of the ideas I've presented to you, and who knows, maybe you'll be surprised.