Simple re-wiring

I've been having a lot of problems with wires shorting out lately in my 76 dart with a 360. I'm tired of doing half assed cut and clamp wiring to get by. I want to just redo all of the wiring as simple as possible since I have a birds nest of wires under my hood right now.

I've seen cars with very clean minimal wiring before and I just want to know if you guys have any tips for the simplest way to re wire the car. I've got an idea on how to do the ignition wiring. But headlights and turn signals and all that I could use some help. And any information on when and where I should use relays.

I'm also wanting to get rid of the old glass fuse box and wire in a new style fuse box so any help with this is appreciated. Thanks!