This document summarizes the author's experiences with several failed startup projects and lessons learned. It describes mobile apps created by the author's company Siogio including a QR code scanning app for product information and coupons, and an interactive advertising display game. It also outlines autonomous vehicle projects including a small self-driving car for indoor use and a larger outdoor prototype. Key lessons highlighted are the importance of finding users, marketing costs, team building, thorough research before starting ideas, and focusing efforts on truly enjoyable projects. The author is now working on a startup matching app called "Startup 168".