The right way is to use steel conduit for the electrical, and large diameter conduit for the snake cables, PVC is okay and easier to assemble, but grounded steel might help shield the cables. Keep distance between power, audio and control (RS422, midi, etc) cables. Where they have to cross, perpendicular is good.
Another option is to put power in steel conduit, and audio on hangers behind the equipment. Personally, I like this option when snakes aren't used, or behind the gear patch changes is anticipated.
Rack mounted stuff:
http://www.ortronics.com/USA/products/images/partnumbers/400px/60400057.jpg
These also work:
http://www.cabletiesplus.com/Zaback_details.cfm?TieID=2
You can also homebrew this stuff, one can screw metal coat hangers on the wall behind your gear at waist level or just below the table top, and sling the cable snakes over the hooks. This is good when you don't have 3000 balanced feeds
Another option is to run two 2x4's from the table to the back wall perpendicular to the wall, and string two steel rods between. Tie the cables to the rods/dowels/etc.
A friend of a friend of a friend who had an old barn studio used a wide, 100 year old wooden ladder suspended on posts between the wall and the console table. Beautifully stained and clearcoated, matched the rest of the wood in the room. Cables simply laid underneath it with wire ties.
There's a lot of ways to do cable management both professionally and homebrew. Just make sure whatever you do, its secure, not impossible to remove, and doesn't put any weight of the wiring trunk on the ends, jacks, etc. ALWAYS support the wire, not the ends.
Unless you really, really like soldering
