Where should you put rear speakers for surround sound?

Ideally you want them behind you with one to the left of you and the other to the right. You can do a search on the net for surround sound speaker layout and you'll get a couple of examples as to where to put them. If you have satellite speakers for the surround (these would be the smaller speakers) than you will want them mounted on the wall (with speaker mounts due to the positioning of the speakers) so that they are pointed at the location you will be watching television. This goes for all the speakers. The receiver should have a set up feature that will either have you inputing information as to the location of every speaker (distance in feet the speaker is from where you will be sitting) or if you have a higher end model than you might just have to plug in the mic (will come with the receiver) and put it where you will be sitting and let the receiver run through a series of sound checks to figure out the best settings based on your positioning.