Use spring-loaded folders to access folders while copying or moving items.
Apply color-coded labels to Finder items.
Use aliases to make frequently used files easier to access without moving them.
Quickly reopen recently used items.
Use the new Quick Look feature to view the contents of a file or folder without opening it.
Use the Info window to learn more about an item or set options for it.
Compress files and folders to save space on disk or minimize data transfer time.
Undo actions you performed while working with the Finder. ...