Ask HN: Just got a job at BI/ERP sales & deployment. Any tips?

Probably most of the people here at HN have had some experience with software deployment, sales and live demos. Say, you already have a product you trurly believe in, you know it's great and you have an existing customer base.

How do you actually convince your clients/prospects that a new piece of software you also have in stock could be helpful for this client, how do you explain that the software can add value to the business?

Any reads, tips, videos or comments?

I don't have a CS degree (still working on it though) - what do you think the biggest challenge would be? The open minded company owners wanted to have a guy like me on board because they liked my strong presentation/communication skills. I've worked at marketing and customer relations departments for other companies for about 2,5 years. I know some BI/ERP systems only from the user's perspective.

During the job interview (which was difficult because I needed to convince my future boss that a person without a strong IT background would be good for the job) I risked and said that most of the clients do not have even a basic understanding of the technical stuff. They just assess the possible returns from the investment that has to be made in order to deploy and implement some new solutions at their firms. Would you agree? What are your experiences?