You know that ⌘-Delete will send a file or folder to the Trash. But what if you want to put the thing back? If you act quickly, you can go to the Edit menu and do “Undo Move” (or ⌘-Z). If you don’t move quickly, just go to the Trash, click on the file or folder, then go to File/Put Away. Somehow the Finder knows where the file or folder came from. Neat. I would practice this now, before you need it.
This is the Finder’s File menu.