Help with one call close

We have one phone call to pitch our product and get the buyer to chose us to undertake a survey. Would you have any advice about how we might be able to close this type of sale in one phone call? Thanks.
If you watch our videos and look for tips, all of the tips apply whether your sales process is one call or multiple meetings. I actually see the process as being three steps explained in this video -

If you are trying to a one call close, you still need to go through these steps, you are just consolidating them down to one call and moving through them quickly.