Where can I find reviews of board games?
BoardGameGeek can be a great resource, but it can be a bit hard to figure out where everything is.

First, you can search for games by name, if you know what game you're looking for. Or you can use the "Browse" feature to find games by category or mechanic.

Once you've found a game, you find yourself on a page that's stuffed full of information, somewhat haphazardly laid out. At the top, there is the name of the game, a picture, and some basic information on number of players, suggested age range, and so on. This can be useful to determine if it will work well for your group.

You then see a description of the game, followed by some places it might be for sale, followed by some additional information. Keep on looking as you go down, you eventually come to the Forums. Click on the "Reviews" link, and you will see a list of all of the reviews for that game. Look through these; they tend to be fairly detailed, explaining the mechanics of the game and how they work.

That's not all that BGG has to offer, though. If you keep looking further down the page, you come to the Statistics section. This is where statistics about people's ratings and the game's ranking are collected. One of the links is to "Personal comments." This will give you a list of many short comments that people have made on the games, organized by their rating. I find this invaluable for getting a quick feel of why some people liked the game, and some didn't; I usually try to check out a few of the comments with a 10 rating, a few with a 7 rating, and a few with lower ratings, to get a sense of how different people see the game. Only a few people leave long, detailed reviews, but there are usually hundreds of people who leave comments.