After the eyes, you should learn how to draw a perfect face. Guys have pointy or squarish faces, girls have beautiful oval visages. Just don't make the faces too long, then they would make the anime person look like a horse. Then you can fill in the face and nose, mouth and hair. Eyes turn weird when the anime person feels different emotions.
Sad eyes shine with tears, and angry eyes look like a strange V-shaped figure.
I like Sakura's nose. Vegeta has an evil, pointy nose. Look at Sakura, she has the messy, yet stylish sort of hair. Stick to the spiky look for guys and the wavy, elegant hair for girls. You can even modify Sailormoon's hair.