I guess technically the first thing I did was OEM cargo mat/tray/liner that I am frankly a little disappointed in. Also added floor mat/trays from a company called Lasfit. That was a bit of a dice roll as I had not heard of them, but they are VERY nice and fit perfectly.
Currently painting up some rock sliders from Westcott Designs. The welding is beautiful, like "work of art" quality. Bonus for me that they are local so I could pick up and avoid shipping costs. I chose to paint instead of powder coat since I will be scraping them routinely anyways so touch up will be much simpler. Then skids and that will be it for a while.