I find Eater to be the most helpful and accurate, and I appreciate how I can search for different types of lists. Best burgers, best brunch, etc. I won't use Yelp or Trip Advisor, they're not trustworthy sources IMO. I haven't had a bad experience at an Eater-recommended spot.

Outside of large US cities, it's more difficult and I read a lot of travel blogs and other forums to look for trending restaurants. Finally, I think this FT site can be a good source. There are a number of us here who are self-professed foodies, and I trust the recommendations here when they come with a personal review. The difference here is you have to post your specific question -- for example, "I'm looking for a good place for birthday celebration on the north side of Chicago or Evanston. We'll have 6 people and we'd really like a place that has great steaks and seafood. Entrees priced under $x." Not: "Where can I get a good birthday dinner in Chicago".