I will be meeting with a prospective client to list a property. Any advice on how to wow them and get the listing. I am relatively new in commercial real estate and would appreciate any tips.

yeh, mention that we can provide financing for your buyer.

A website focusing on your strengths in the commercial market helps alot.

Make sure your listing presentation shows them what you will be doing for them! Where you advertise and how often. Are you a premium LoopNet member? If not it is worth the money and adds more to your presentation.
Become an expert in 1 or 2 types of commercial properties. Create your own mini list of everything for sale in your area, even the FSBO stuff.

That is actually only a very minor thing in commercial.

I didn't say it was the only thing to do, but I have found it to be a very effective resource to refer potential clients to initially to let them see some of your areas of expertise, past transactions, and how you have helped others.
I think it helps in gaining you a level of trust and confidence from a potential client.

Your points about focusing on your marketing techniques are also right on.