Generate a full detail guide on the connection between altruism and happiness. The guide should be inspiring and community-focused. It must include sections on: 1. Explaining the 'Helper's High' phenomenon. 2. The psychological benefits of volunteering and acts of kindness. 3. A guide to finding volunteer opportunities that align with your values. 4. A list of small, everyday acts of kindness that can boost your mood. Please include a supportive disclaimer.