1. could you please tell me what is this 'golden section'? i dunno, but i think left/right symmetry is important...
2. check into the forums at
www.johnlsayers.com, some of 'em are dedicated to the cause. Also check ethan winer's site and
www.realtraps.com for info on treating your own space.
3. a lot of things depend on the type of music, intended audience, your personal preferences, seating, monitoring levels, noise levels in the current space, neighbours, highways, clients requirements and a million other things... maybe more specific help will come your way. A pic of the space and your gearlist will certainly help
good luck,
self.