A learning sketch done from *
LaLunatique's stock here:

(edit 12-20-12)
Re-sketched since my first post--I couldn't stand the original legs or anything. >< So! Here's the newer version with the 'skeleton' still intact.
Still fussing with her right foot though. XD Can't be satisfied with it for anything. And please forgive the watermark, doubt anyone'd be interested in taking it but I'm proud of this.

But it's so
shiny.

Shiny and actually shocking
GOOD.
...So yes. XD Someone please crit? I need to know what to do better next time I try to sketch a pose.
Anyway, this is bad. Structurally there is no sense of 3D. The groin has been completely ignored, and all the components have been contoured, but not really well.
Firstly, the head. The head just, doesn't work like that. There is an artist Riley, ( but I can't find the right spelling ) who does a really good step by step tutorial. Though I haven't found it, but I'll hunt around when I can, or redraw the tutorial for you if I can't. Anyway, structurally, you need to think 3D.
Draw it in boxes, you're forgetting the actual form, for example, the chest, well you forgot the side, we're all pretty 4 sided really, smoothly, but still 4 sided.
The breasts, well, are not merged into one, they also come from the arm line, you know near the armpit? You're forgetting that.
I'll do a redline when I get home, because there is so many things faulty, that if we can fix now, you'll be stronger as an artist immediately.
However, I have placed some of my sketches on DA, I'm not the best, but I do show my sketch lines, perhaps look at them to see how to think more 3D?
[link]
I hope I helped a little! Sorry D:
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