This document provides a summary of key aspects for building internet-scale applications based on a talk given by Gaveen Prabhasara. It discusses the importance of culture, acquiring domain knowledge, building the right team with the proper skills, designing solid architecture and avoiding over-engineering. It also emphasizes using the best tools, implementing best practices like automation and continuous integration, addressing security from the start, and planning for scaling from the beginning. Monitoring and metrics are also highlighted as important for measuring and improving performance over time.