Focus on getting the overall form first, then worry about the details like getting the "hair texture". Figure out where the lights hits least and shade there, and highlight where it hits the most. Then, you can detail the edges of the shadows and highlights (and possibly add more) to produce a more hair-like look.

the hair is looking godd. now break it up one more level, and then try to suggest texture with detail. you have a solid base, now make it more natural and we can critique your attempt.

you also having problems with extra colors and some colors lack contrast from others, like the pink at the bottom of the chin

Be careful not to lose those well-defined forms when adding the hair detail. Don't worry about having long continuous lines in the hair. One hardly ever sees such clear lines in hair. We "know" they're there because we know what hair is, but we can't actually see them most of the time. Suggest the texture. You have neither the room nor the need to draw it all out.

Wow thanks for collecting those pics! I think I get the point now.
*opens editor*

Wonderful progress. A couple of notes

It seems she has multiple shades of color in her hair, but how you've done so confused us to the volumes of the hair so it looks flat. Try adding highlights of different color after you've already made her hair look good as plain brown?

The overall shape of the hair here and there seems a bit unnatural. Especially the left side how it looks like she has hair that grows from the back of the head to the front. Study how hair is laid on the head. Where the hairlines are and the direction hair grows in different places.

This leads into another point. Your ideas are there, now be more bold and emotional with how you do it. Give it life, even if it is to make her hair seem more ratty or ugly. For instance you can give her lots of stray and crooked strands or emphasize more the strands you did to the left of the earring on the left side. Give her strays at the top. Give some blank space in between the hair at the right side so it's not just a wall of hair. In her pose, she would have gaps in the hair to see through there. The hair on her chest on the right side looks more like pudding than hair so it needs work there.

Overall you're doing great

it looks pretty good!! :) im not sure how i feel about the added pinks and yellows in there, but it is subtle enough.

now for the best part- pixel refining.get rid of jaggies, anti alias etc

Smoothed again and submitted: http://pixeljoint.com/pixelart/98568.htm
Thank you guys for assistance!