Here's a few questions for change that are very powerful. They work because you are influencing the conversation in the direction that causes the result that you want.
Like chess moves think about questions that will lead them down the path that you want so you uncover real pains. Here is an example below:
You: "What challenges do you have with the software you have at the moment?"
Client : "Well the x and y is a bit time consuming."
You: "And what impact does this have on your work?"
Client: "It takes up more of our time."
You: "What does excess time on one part of your job cost you?"
Client: "I guess the bottom line is it costs us money."
You: "Sounds frustrating. Is it frustrating?"
Client: "Yes very."
You: "So if we had a product that was easily quicker and smoother and took away all the frustration and in turn saved you money, I guess you would be very interestedyes?"
Client: "YES!"
This is just a short example of consultative selling. Ask more questions to find the real pains and make the pains bigger and noticeable then deliver your solution later in the presentation. By doing this your solution (i.e. your product) will have a greater impact.
Questions are key to great selling especially in the bigger sales products and services. Practice writing out questions that you ask and at least 3 or 4 follow on questions that can peel away the layers of your client.
These are examples of impact and consequence questions. What that means is that you suggest a problem and your prospect tells you why it is such a problem. Effectively they are selling your product or service back to you in a way that rationalises it for themselves.
When someone can justify that they a problem and your solution solves it then very often your work is done, all you need to do is ask for the business.
Great questioning skills are always the key to getting to this stage, try them out when you next have an opportunity and guide your prospect in this direction. You will be amazed at how well it works!