Wire management guide?

Hello everyone, I was just watching this video,


and noticed how clean the wire management was. I have the case shown in the video which is a Corsair Carbide Series 300R. My CPU power cable doesn't reach the CPU power input so I have to simply run it over top of everything which is fine with me because it isn't a big deal really. But all my other cables can go behind the motherboard tray but it doesn't look as clean as in the video. Are there any guides out there for wire management?

I have the same problem. I route all my cable behind the tray, and it looks tidy enough, but the business end looks like a hot mess.