I created my first batch file last week.  A batch file simply runs some DOS commands like starting programs or copying files.  It's useful for executing repetitive tasks, such as renaming or backing up files.  My batch file contains these commands: 
copy "c:\my documents\misc\imp.doc" docs
copy "c:\my documents\misc\money.xls" docs
The file resides on a USB stick and simply copies two files from My Documents to a folder called docs on the stick.  The reference to My Documents has to be in quotes because it contains spaces.  The reference to docs is an absolute path that refers to a folder on the stick.  This is important because drive letters for USB devices will change depending on which USB port they're plugged in to.  So if the batch file referred to "G:\docs", it would encounter an error if the USB stick wasn't plugged into the USB port that Windows calls "G:\".  I found this link helpful for creating the batch file. #technology