Ok. My suggestion is to place things inside folders and label the folders in a way that makes sense to you. Just like file folders in a file cabinet. You can also make folders within a folder to further organize from there. (Highly recommended if you have more than 5-10 things in a folder.)
As you organize, don't be afraid to make changes as new needs arise. It takes a little time at first, but once you get things organized, you'll be so thankful you put the effort into doing so.
Hope this helps and best of luck,
Bryan