The first thing I do for almost any slide is "counting the boxes": how many points does each argument have, how many people are there on the team, how many layers to the technology, how many steps in the process.
This drives the layout of the slide: 2 columns with options and 3 arguments each, a 5-step value chain, a 6 x 4 grid of logos, 5 management bios next to each other, 10 columns of sales data, etc. This layout will make sure that your slide looks evenly spaced out. You are also see that in most cases, the (bullet point) list grid structure is actually not the one you need.
PowerPoint and Keynote do not have very strong grid capabilities. Spacing out equally sized boxes across a slide is a pain, and table editing is not much better. And that is why I made the grid structure the central feature of my own presentation app SlideMagic, try it out!
Art: Perspective box, Pieter Janssens Elinga, 1623