Here's a sampling of advice I've heard over the years. To be clear: I vouch only for the first answer.
(1) Review a good outline, read the rules carefully, do lots of example questions, and get a good night of sleep before the exam; (2) do a somewhat cursory review of sample exam questions, because the exam is only slightly harder than the written portion of the driver's exam; (3) pick the second most ethical answer; (4) ask yourself "wwjd?" and eliminate that answer, for obvious reasons; (5) go with answer C.