This document provides guidance for startups preparing a pitch deck for a demo day event in order to raise investment. It recommends developing interesting company content before creating the deck, establishing a clear objective and messages, and telling a compelling story through 5-10 simple, visual slides that each convey their key point within 5 seconds. It also stresses the importance of practicing the delivery to successfully convey the pitch within the 2-5 minute time limit on stage. SketchDeck offers a service to help design effective demo day decks.