How far apart do you position your speakers ?

Traditionally many"so called experts" recommend that your speakers and your listening position should form an equilateral triangle. Thais means that the distance of each speaker related to your seating position should be of equal distance, and that the distance between the two speakers should also be that same distance, of course this is just a basic guideline, albeit a good one to start from. Remember that there are certain speakers that are designed for specific positioning such as nearfield listening, or corner placement etc. With these types of speakers the traditional guidelines will not usually apply.

Inna,
Are you saying the distance between the speakers should be 1.5-2 times the height of the speaker? That's just plain weird. I have never heard of that, and it doesn't make sense. Every speaker has a different dispersion pattern and sensitivities to side wall proximity etc, so how could the height influence the diatance between the speakers?

Speaker and room dependent. Gives the speaker and the room dimensions and we might be able to offer some guidance, though often, that will just be a starting point.

I thought the rule was the speaker width apart should be as wide as the distance from your seating position to the speakers? So if I'm sitting 12 ft away from my speakers they should be 12 ft wide as best as you can. As for distance of the rears of the speakers from the wall I just follow the instruction manual as best as I can. Right now from the rear of the speakers it is about 8" from the wall.

Triangulation is a rule of thumb, and usually much better than what some might do without any guidance. But getting it right for any particular speaker is dependent on the speaker, the room dimension, room treatment, and sitting position. But as a starting point the equalateral triangle is a good start, but that sound incredibly close to the rear wall and some [?] most [?], certainly not all, speakers will have a hard time with stereo center fill if they are 12 feet apart, more than 7 with mine and the image density is reduced, though it does make for a "wide" soundstage. The rule of thumb works, but rarely ideal - it is a starting point.