Ian Altman discusses common mistakes in procurement, emphasizing the importance of not commoditizing oneself. He advises vendors to focus on what's in the customer's best interest rather than succumbing to unrealistic demands for line item pricing and cost disclosure. Altman suggests engaging with line-of-business people to understand client needs and past experiences, which can help tailor services to achieve better outcomes. He recommends shifting the focus from price to results by discussing long-term success metrics with clients. Vendors should articulate their value proposition and be prepared to negotiate based on overall solutions rather than individual items.