Anywho, these tutorials seem great if you're stuck on how anything should look!
NOTE: These are NOT my tutorials! I am just linking them here so you can study them and use them as you wish! DO NOT CLAIM THESE AS YOUR OWN!
Enjoy!
Arm Shoulder:
[Image: http://fc04.deviantart.net/fs70/i/2011/042/f/d/arm_shoulder_study_2_by_moni158-d39a8oo.png]
Arm Elbow:
[Image: http://fc05.deviantart.net/fs71/i/2011/035/0/f/arm_elbow_study_by_moni158-d38t77j.png]
Hands:
[Image: http://th08.deviantart.net/fs70/PRE/i/2010/284/f/d/_drawing_hands_and_tips__by_moni158-d30iuq8.jpg]
Anime and Realism lips:
[Image: http://th04.deviantart.net/fs71/PRE/i/2010/282/c/9/anime_and_realism_lips_tips_by_moni158-d30fr1w.png]
Anime eyes and Tips: (+rep to whomever can name a few)
[Image: http://th09.deviantart.net/fs70/PRE/i/2010/282/8/5/anime_eyes_and_tips_by_moni158-d30dhai.png]
Male anatomy:
[Image: http://th02.deviantart.net/fs70/PRE/i/2010/277/7/b/more_anatomy_tips_by_moni158-d30459e.jpg]
Female anatomy:
[Image: http://fc05.deviantart.net/fs70/i/2011/036/3/c/female_body_study_by_moni158-d38u8ip.png]
Legs:
[Image: http://fc06.deviantart.net/fs71/i/2011/037/e/6/drawing_legs_by_moni158-d38x86n.png]
Painting Tips/Various others:
[Image: http://th06.deviantart.net/fs71/PRE/i/2010/302/f/3/painting_tips_and_process_by_moni158-d31s4pq.jpg]
[Image: http://th01.deviantart.net/fs71/PRE/i/2010/277/6/e/more_anatomy_and_colour_tips_by_moni158-d302b2t.jpg]
[Image: http://th05.deviantart.net/fs70/PRE/i/2010/274/0/0/anatomy_and_colour_tips_by_moni158-d2zvxz4.jpg]
These are in no way inappropriate!