Heya, here i'll post some sites that maybe can be useful, if you know more, post 'em
Tutorials
http://www.pixel2life.com
http://www.good-tutorials.com
Brushes
http://www.deviantart.com
Renders
http://www.gamerenders.com
http://www.clantemplates.com/renders/gallery
Fonts
http://www.dafont.com
http://www.1001fonts.com
Art
http://www.conceptart.org
//DarkstaR
Tutorials
http://www.pixel2life.com
http://www.good-tutorials.com
Brushes
http://www.deviantart.com
Renders
http://www.gamerenders.com
http://www.clantemplates.com/renders/gallery
Fonts
http://www.dafont.com
http://www.1001fonts.com
Art
http://www.conceptart.org
//DarkstaR