Terminal Blocks

I used terminal blocks anytime we had to wire to or from an external device.

Yikes, can't follow the wiring. 

Wires just hanging from the bottom of the track didn't help things.

One of the problems with the wiring we replaced was that wire were going directly from the Arduino controller to external spots.  This made it difficult to move or remove the Arduino.  Now, if you have to move, there is generally enough slack in the cables to move the controller board to a better location 

Note:  I only had larger terminal blocks so don't slight me for the over abundance of terminal blocks.