Accuracy is very important, especially as an early mistake in the plog section will devastate your marks over several subsequent questions.
Speed is also an issue. For example finding an airfield from a lat/lon reference is not difficult, but doing it under time pressure on a work-hardened chart in an oubliette requires significant workload management skills. If I were you I would practise the 'obvious' skills at speed, and get very very familiar with your plotter, ruler, etc.
Backpacker, did you do your Nav Exam in England? I could swear we had the same exam room!