Engine Wire Loom Routing

[ivanuf2]

I am just starting the wire harness install. I got the Painless set up and looks good so far. My question is based on the experience of people that had done this before, What is the best way to route the engine section, front section, ect. I will like a clean install and not have wire looms laying around the engine bay. Any pics and cable routing ideas, tips and tricks before I start? Here is a pic of my engine bay at this point. Thanks in advance for the help.