DIR C: D:
View directory of drive C and D at the same time.
DIR /S /B
Get a list of files in the current and sub directories with their full path name (directory name + file name).
View the short (8.3 DOS file name) and the long name of files in the current directory.
Display all the files in the current directory including hidden and system files.
Sort files by size -- smallest first.
Find out even more cooler styles (well, okay, parameters) you can use with the DIR command.