there are tonnes of techniques in "Away" by G GOW
the major ones are: symbolism, lighting, allusion, directors notes etc. Remember, u must explain technique, what it does, how it is used and most importantly, relate it back to physical journeys. We have been drilled by our teachers so much on this that all our heads are bleading. (metaphor- relate to Gwen and her caravan). You'll get there. If in doubt see ur teacher.