my website effecting with manual actions thin content

i have 3 websites and all of hit by thin content here is mesg what i got from google webmasters tools please help me guys how i fix this
here is my site http://mp3skullfans.com and http://mp3skulld.com please help me how i fix this thanks
This site may not perform as well in Google results because it appears to be in violation of Google's Webmaster Guidelines.
Site-wide matches Some manual actions apply to entire site


[TABLE="class: cms_table"]
[TR]
[TD][/TD]
[TD]Reason[/TD]
[TD]Affects[/TD]
[/TR]
[TR]
[TD][/TD]
[TD]Thin content with little or no added value

This site appears to contain a significant percentage of low-quality or shallow pages which do not provide users with much added value (such as thin affiliate pages, cookie-cutter sites, doorway pages, automatically generated content, or copied content). Learn more.[/TD]
[/TR]
[/TABLE]

any help guys ??