In general, the best place to possibly get good reviews is to have friends with similar tastes as you and ask them what they like. Not only will you get recommendations you know are good, you will have someone to talk about the games with/play multiplayer with.
And despite the fact they will be dated, don't forget some of the classics. Planescape Torment and Quest for Glory V were fantastic. Even with dated graphics they stand up well to many modern games, at least to someone with my taste in RPG games.
Then again, the only games I've played this year are Modern Warfare 2, Dawn of War 2, Company of Heroes, Fuel of War and Red Faction Guerrilla - all but Modern Warfare 2 came on the THQ multipack I got off steam because I wanted a copy of Company of Heroes. Before this, I'd never even heard of Red Faction Guerrilla, but have been playing it a lot over the past two weeks!
I don't follow the recent developments, but I have a few people or teams whose opinions resonate with me, so I regularly read what they say. Here's "Top 9 Games of the Decade" by Auriea Harvey of Tale of Tales, whose opinions I value very highly.
http://tale-of-tales.com/blog/2009/12/31/aurieas-top-9-games...
If you're not familiar with their games, check their blog to see if is the kind of games you're interested in. But again, to even know these people whose advice I follow, I used to read many websites, magazines and even visit conferences.
I am not completely successful; I knew about Fallout 3 for a while because it got onto some of my RSS feeds that had nothing to do with gaming per se. But for the most part it works.
I personally just buy games at a lag usually they are much cheaper (after a year or two) and time proven, if you are a pc gamer steam is amazing and for consoles I really have no idea I guess I just hear word of mouth about the new games.