Ok, so plug aeration it will be. Going back to my original post... I'm trying to renovate the lawn without killing off everything with a chemical and tilling it up and re-seeding. I'm trying to renovate what is existing, now that I have some time to focus on it. That's ultimately what I'm trying to accomplish. So... that was the meaning of the post...ie- What should I focus on 1st. I assumed it was the moss, since it was probably hindering any feeding of the existing grass, it was slowly killing the grass, and any efforts to over seed would have been fruitless with its existence. There will be a sprinkler system installed before next spring, so my efforts shouldn't be entirely in vain. I'm trying to do the right thing here and in my limited knowledge of 'lawn care', I came here.