When drawing anime or manga characters, it is important to remember that short or long, the hair must have an origin point. The hair must either be concentrated along a line so that it looks like a typical hair part or the hair can be concentrated along a point, which is usually located towards the back of the head and slightly off-center.
Very little foreheads appear in anime. Hair tends to swoop down over the forehead and to the side of the face, or the forehead is covered by bangs. Anime bangs tend to be ragged and uneven and usually come down just to the eyes or extend a little lower so that they are partly covering the eyes. It's a look that isn't practical in real life, but works for cartoon characters.
Natural looking short anime hairstyles, do not look too much different than regular everyday hairstyles. They do all have that slightly uneven look in the bangs, in the ends of the hair or both. Often, there are several layers in an anime hairstyle with those jagged ends marking the break between the different layers. If copying an anime style for your own look, the natural look is probably the easiest to pull off, but you will want to clip those bangs so that they are not directly in your eyes.
Anime characters tend to be a bit more exaggerated than their real world models, and that goes for their hairstyles as well. In short hairstyles a lot of very spiky hair styles are seen. These run the gamut from gently tousled looking spikes, to sharp pointy spikes that stand a few inches off the head. The wildest styles feature prominent spikes dyed in bright colors.