Before a tour, a tour guide should:
1. Check the route and make sure it is safe and well-planned.
2. Prepare an itinerary and make sure everyone is aware of it.
3. Gather all the necessary materials for the tour, such as maps, pamphlets, audio-visual equipment, and any other relevant materials.
4. Familiarize themselves with the area and attractions.
5. Make sure the group is aware of any safety procedures or policies that must be followed during the tour.
6. Introduce themselves to the group and explain the tour.
7. Answer any questions the group may have.