Wiring Led's How did you do it

I am about to have roughly 20 different led pods and strips in my boat. I am curious what would be the easiest way to wire it.I have a acc. switch on my dash that is not being used so i going to get power from that. So should i run one wire from that around the whole boat and then just tie into in the different spots the led's are, and do the same for a ground wire. Next option run each led and its positive and negative wires all up to the front of the boat under the dash and tie all in there. Can anyone give me some idea's on an easy way to do this or how you did it.Thanks in advance