Neatniks hate visible cables and cords...I know I do. Reddit reader jhoff484 set out to eliminate the cable clutter of his home entertainment center, taking apart a set of wire cube shelving pieces (his wife's college set!), snipped to size using a tin snips, and then attached/arranged to hold an impressive array of cords, power bricks, and a power strip behind his media console. Components are attached onto the metal grid using easy to add/remove cable ties, but twist ties or velcro are also viable options.
That's everything behind the scenes of a Xbox 360, Nintendo Wii, and Linux box for MythTV setup.
Some commenters did note bundling long lengths of cables/cords so tightly could prove a fire hazard, the bends in the cords possibly causing excessive heat buildup, so consider using large, gentler loops when arranging a similar setup for safety.
More photos of this DIY home entertainment organization system here.