how to organize scanned documents on my mac

I would change the file name from "Scan001" (or however your scanner saves them) to something helpful like HikingTrip1, HikingTrip2, etc. Then drag and drop them into folders you create with more names helpful to you. To quickly change a file name you can highlight the file icon and then single click on the file name portion and it will allow you to type. Is this what you meant?