When we travel and when we are at home, food is an important part of our lives. This page is devoted to things related to food, whether it be restaurants or recipes.
Yelp: www.yelp.com It shouldn't be treated as the Bible, but it gets you in the ballpark.
Open Table: www.opentable.com a site that usually pisses me off, but is almost unavoidable for making reservations.
Trip Advisor: www.tripadvisor.com helps when researching restaurants abroad.