Coiling your wire is essential whatever you may need to coil them for. This instructable will cover special tecniques to coil your wires with.
Step 1: Thin wire coil
Step 2: Under-over coiling
Also, you will want to do under-over coiling on the floor if you have a large, delicate wire/loom. Begin with a normal twist loop to make a circle (make this as large as possible because tight coiling is not very good for the wire) Then you need to make a twist in the opposite direction and bring your hand behind the uppermost piece of wire. The image should make this more simple. Then do another normal coil and continue like this, normal, UO, normal, UO and so on. With large cables like looms secure the coil with PVC/electrical tape.