Can anyone suggest some media that they've found effective in learning Korean?  I've tried the Rosetta Stone demo and found it ok.  If others had gone thru a whole Rosetta Stone lesson, I'd love to hear your thoughts on it as the demo lets you experience only so much.  Plus, before I dish out hundreds of dollars, I figure there might be some apps, books, websites, and/or YouTube vids that others already found useful.  

Thank you! :)