Look at the title before you listen: 'A Tour of the Old Harbour'. Predict what the speaker will talk about. Then listen and answer.
How to apply this skill
The title and the first two sentences ('welcome to our walking tour', 'show you around the Old Harbour') tell you the topic and the speaker's job before you hear any details. Once you predict 'tour guide', words like 'walk', 'stay together' and 'watch your step' all make sense.