Here I put together a small list of tutorials and references that are really helpful in drawing. Art is composed of many things, and you can't learn it all by instinct, you need to learn from others too.I hope these help (none are mine btw)!

Tutorial Galleries (namely manga):

•  http://www.youtube.com/user/markcrilley
  
•  http://www.mangatutorials.com/tut/index.php
  
• http://www.paigeedraw.com/how-to-draw/index.php
•  http://alexds1.deviantart.com/gallery/1604172
•  http://www.drawinghowtodraw.com/directoryhome.html

Clothing Folds:

• http://darlingmionette.deviantart.com/art/Tutorial-Clothing-Folds-1-176116285?q=boost%3Apopular%20tutorial&am p;qo=144
• http://solfieri.deviantart.com/art/Clothing-Folds-Tutorial-194453484?q=boost%3Apopular%20tutorial& qo=200

Perspective:

•  http://aquafeles.deviantart.com/art/Pose-and-character-perspective-134011506?q=boost%3Apopular%20perspe ctive%20tutorial&qo=7
• http://browse.deviantart.com/?qh=&section=&global=1&q=head+perspective#/d1ufjum

Coloring:

• http://fog-mire.deviantart.com/art/Fog-s-Colored-Pencil-Tutorial-106695049?q=boost%3Apopular%20pencil% 20crayon%20tutorial&qo=0
• http://gorachi.deviantart.com/art/Color-Theory-App-Tutorial-61529480?q=boost%3Apopular%20tutorial& ;qo=374

Backgrounds:

• http://nika-wolfgirl.deviantart.com/art/Background-tutorial-Part-1-208346837?q=boost%3Apopular%20tutorial&a mp;qo=88

Creatures:

• http://iririv.deviantart.com/art/Tutorial-on-creature-design-110577241?q=boost%3Apopular%20tutorial& amp;qo=441
  

Shame on me for forgetting *facepalm* xD

Pretty great! Thanks for the links you shared. That's a lot for a free tips.

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Welcome!!! Glad it helped. ^^