alien guy test/workinprogress need heLP!

ok this is just a test/work in progress....im trying to learn how to cell shade, get that cool cheeks style of coloring down so comments n suggestions on how to improve PLease please please would help alot! i know im lazy and procrastinate like hell n would prolly rather watch 24 than touch a pencil ever again but im gonna buckle down and finish off the model sheet for this lil guy and do another character...probably a villian and a model sheet for him as well

this was done pretty quicky just selecting areas with the lasso tool and paint bucketing or adding gradients to the area until desired effect is achieved. i tried using my friends tablet that he let me borrow but its so small and shitty and awkward to use. i guess i just need to give it some more time n it will get better eventually.... =P