This document provides guidance for mentors at a startup weekend event. It explains that mentors should help teams work through a process of identifying problems, hypothesizing solutions, discovering customer needs, and iterating based on feedback. Mentors are assigned to teams to ask questions that move the teams toward judging criteria in customer validation, business model, and execution. The questions focus on problem definition, solution testing, market research, prototype building, and customer validation. Mentors should track team progress and be available to multiple teams. Presentation workshops are also recommended to help teams prepare for the final judging.