I usually check Siliconera, The Escapist, Edge, Destructoid and Joystiq for information. Reviews (and Metacritic ratings) shouldn't be used as a metric for the quality of a game, and for the love of god don't just skip to the end for the final score.
Ultimately, I have to trust my intuition. Would have missed out on a lot of good stuff if I 'trusted' any specific critic.
[sub]User reviews are fucking useless, though. Not referring to the ones on this site in particular, mind you, those are structured more like conventional reviews.[/sub]