here is some photo shop sketches i did using a mouse if you have photo shop i suggest turning the opacity down so your able to sketch and once you have a basis to a outline then to the opacity up to preference. First picture i redrew from someone on the top rated pictures so dont give me credit i just thought it was sick!
<a href="http://s236.photobucket.com/albums/ff249/Darkego38/?action=view¤t=twallsketch130mincopy-1.jpg" target="_blank"><img src="http://i236.photobucket.com/albums/ff249/Darkego38/twallsketch130mincopy-1.jpg" border="0" alt="Photobucket"></a>
<a href="http://s236.photobucket.com/albums/ff249/Darkego38/?action=view¤t=SICK11copy.jpg" target="_blank"><img src="http://i236.photobucket.com/albums/ff249/Darkego38/SICK11copy.jpg" border="0" alt="Photobucket"></a>
for drawing basic bodys what i try to do i draw more of a stick figure for body outline then i do various circle to shape the rest of the body, if you goodle body sketches you will see what i mean. always draw posture first then add clothes. thats my opinion anyway. good luck