I moved all the items out and sorted them. I had basically two types of things stored under the sink - cleaning supplies and plant food items. In order to keep the items together I grouped them into containers. This will make it easier to find what I'm searching for when I reach under the sink for an item.
I now have one basket for some basic cleaning things that I like to have handy and another basket for plant food and fertilizers that I use for my houseplants.
I didn't spend much time working on this mission, but I like the results. I think having the items sorted in containers will be an improvement under my sink.