Moreover, if you practice with a friend who speaks English too, then, you can speak about the old times and the fun will be double!
But first you need to warm up with this activity:
Read the theory
Do exercises:
Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6
Test 1 and Test 2
Now you are ready to try this activity talking about what you were doing and what your life was like when you saw a favourite film, for example, this scene from Grease: