As a moe anime girl artist myself, I know alot of stuff that make them look really cute ^^
Like mentioned before, less facial detail, shorter and rounder faces/eyes make them look much, much cuter.
She has the cute clothes down, and the hair is okay too, but yes, less detail in certain areas is better.
Such as Inku-chan from Moetan. ^^ Not drawing her nose makes her face look softer and brings more attention to her eyes, blushing cheeks and cute mouth :3 And using soft pastel colors also makes the character much softer. (Myuki and Tsukasa also have these soft colors, making them alot cuter.)
Trying soft, detailed shading helps too. Not too much detail in the eyes, just make them big and cute (unless they're crazy or cat-like or something, like when Rena from Higurashi goes crazy lol xD)
So, pretty much: SOFT, the LEAST detail you can put into the face the better (but don't leave out pink cheeks!! They're key!) and more detail on clothes and pastel colors
Hope that helped ^^