Ikea cable trays under the desk: http://www.ikea.com/us/en/catalog/products/50035115 http://www.ikea.com/us/en/catalog/products/50035115 And on the desk I use

Ikea cable trays under the desk: http://www.ikea.com/us/en/catalog/products/50035115 http://www.ikea.com/us/en/catalog/products/50035115 And on the desk I use some plastic tubes that hold several cables together, also from Ikea.