I recently took a position as a PC & LAN Admin and now have the task of making things right.
This weekend im implementing some cable management where there was none before.
Here are the things i have bought
2x - http://www.amazon.com/gp/product/B000N2RC2O/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1
10x - http://www.amazon.com/C2G-03746-3-5-Inch-Horizontal-Management/dp/B00006MJFL/ref=pd_sim_pc_6
i wont be able to put all the horizontal's in on the same rack because of space but it will make it much better. I also documented every single cable in this mess, color coded and notified of special ports. I have attached the wiring diagram and here are some before pictures.
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http://imageshack.us/a/img17/1944/serverroom1.jpg