This document provides a guide for starting a social startup. It outlines the core components of an idea, strategy, team, funding, and sustainability. For each component, it lists reality check questions to evaluate the strength and viability of the idea, strategy, team's experience and motivation, funding sources and changes over time, and sustainability after initial funding ends through strategic alliances or ongoing need for the service. The document also briefly outlines roles of the internet like interactivity, crowdsourcing, crowdfunding, and data visualization that can support a social startup.