At no point in your career will the expression “say what you do, do what you say” have a more personal and visceral reaction than the day you discover you have signed up (voluntarily or otherwise) to deliver a demonstration of a product your team is developing. The “demo” is the opportunity for your team to shine, casting a warm glow on all who behold what they have wrought. Successful demos rectify past mistakes, generate customer satisfaction, invigorate your development team, and capture critical future funding. It can also be the moment when the project is at its greatest risk of being misunderstood or cancelled, even when the demo was not originally intended to be meaningful. This white paper outlines some best-practices and ground rules for planning and executing the demo so that the glow is from its excellence and not from going down in flames.