Step 1: Placing The Speakers
If you want the speakers for music like I did you can put them anywhere you want as long as you can hear them.
But, if you want them for a surround sound setup like a home theater you need to position them in a logical way. The center channel and front left and right need to go on or near you TV like i did our home theater set up. As you can see in the picture there is a speaker to the left, the right and the center speaker in the center of the TV. The rear speakers need to go behind where you are sitting, such as your couch. They sell stands for about $30 each, or you can mount the speaker to the wall like i did. (please note this is for a 5.1 channel set up). For a 7.1 Channel set up it would be exactly the same except the rear channels are different. The 4 and 5 channels are at the side of your head, or the sides of the couch and the 6 and 7 channels are behind like in the 5 channel set up.
The Subwoofer is the easiest part of the whole set up. It can go anywhere in the room because low frequencies are impossible to detect where they are coming from with the human ear. The best spot though is next to your TV or computer screen. Make sure not to put the subwoofer touching the TV or computer screen though because it will cause the set to resonate and it will rattle. I had this problem when i installed mine in my room becuse it was touching the wall and it would shake the pictures on it and was very annoying so i moved it to the top of my filing cabinet.