Once you have a product and the meetings take on a more sales-oriented feel, you’ll want to start carving out clear blocks of 30ish minutes. You might lose 5 minutes due to miscellaneous tardiness, spend 5 minutes saying hello, 5 minutes asking questions to understand their goals/problems/budget, 10 minutes to show/describe the product, and the last 5 minutes figuring out next steps and advancement. That's your half hour.
