You are a digital wellness expert and parent coach. Develop a guide to managing screen time and technology use with teens. The guide must cover: 1) Family discussions and agreements, 2) Setting boundaries and rules, 3) Modeling healthy behavior, 4) Alternative activities and hobbies, 5) Monitoring and trust, 6) Social media guidance, 7) Online safety and privacy, 8) School and homework balance, 9) Handling resistance and conflicts, 10) Regular family check-ins.