Princeton Restaurants
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The Student Guide to Princeton's guide to restaurants is fairly detailed if a few years out of date.
Computer Science professor Kevin Wayne has probably the most exhaustive guide to Princeton area restaurants available, although it's a couple of years old now and be warned that many of the restaurants are a short drive away (and sound delicious, which just makes it worse).
Point's set of restaurant reviews is frequently useful but also frequently inaccessible—I have no idea why Point is down/painfully slow so often, but hopefully it'll be fixed soon. Requires PUID.