If you can, choose tour operators, airlines and hotels that are committed to the host communities and the environment.
Adapt to local customs and habits, without imposing your habits and lifestyles.
Don't take anything from nature, don't take souvenirs of the natural and archaeological spaces. Do not buy products made from endangered plants or animals.
Consume locally, buy your travel souvenirs at local shops and craft shops, try to find typical places where locals go and try the most authentic local cuisine. This will help boost local cultural traditions and businesses.
Don't waste energy, turn off the air conditioning and lights in your room every day, and minimize waste generation.
Use public transport and bicycles whenever possible: in addition to being a cheap and environmentally friendly way of mobility, you will also be able to see what the day-to-day life of the locals is like.
And spread the word! When you come back home reflect on what you have learned from your trip and on your achievements as a responsible tourist. Tell your friends and family and share with them the practices and benefits of responsible tourism when you travel together.