Some best sustainable hotel practices include: 1. Implementing energy-saving measures such as energy-efficient lighting, solar panels, and smart room controls. 2. Conserving water through low-flow faucets and toilets and reusing towels and linens. 3. Reducing waste by implementing recycling and composting programs throughout the hotel. 4. Sourcing food locally to support local farmers and reduce carbon emissions from transportation. 5. Providing guests with eco-friendly amenities, such as refillable toiletries and filtered water stations. 6. Educating staff and guests about sustainable practices and encouraging their participation.