Well, you need to practice a lot more!
It seems you used the head measure (I can see some markings counting heads) and nodes to draw where the articulations should be, but you lack structure!
Your body seems too elongated and it's like it's made of play dough ^^; All that is easily fixed by learning how to properly use structure.
I grabbed my Loomis book (look Andrew Loomis up, you'll find a lot of useful material!) and drew his suggested structure on top of your drawing. It ended up looking like the kind of body I usually draw (and of course it probably has lots of flaws too!), I don't know if you're going for a more stylized look (a la CLAMP, for example?).
Hope it helps you see where your weak points are, and keep practicing!

Using posemaniacs one hour a day should be great for you

When drawing something, anything, USE REFERENCES!! Use your Google-fu!
Don't trust your memory, and don't blindly trust what others teach you either.
Research, observation, analysis, experimentation and practice are the key! (: