I'm just thinking of the path the electrons will travel. In order to have low inductance, they will have to pass close in their path one way and the other. Imagine a battery connected to a load with a long cable. If the wires in the cable, are close together, the inductance is low, if the wires in the cable are further apart, the inductance is higher. This is due to the electrons travel from battery to load in one wire, and from load to battery in the other wire, creating opposite electric fields along their paths. So what I have to make sure, is that the electrons will travel in each direction, in 2 different conductors, placed close together. Right?
Well, maybe this all happens automatically with a power plane since the current will take the path with least inductance, according to a paper I read once.