How to Draw Piccolo (from Dragon Ball Z)
We'll begin with sketching the basic shape of the face. Draw a large, slightly elongated circle as shown. When drawing the lower half of his face, notice that the lines drawn in red are about the same distance from each other. It is important to place the guidelines correctly, because they'll come in handy later on. Make sure to draw your lines very lightly until you get to the final draft so that the guidelines are easy to erase later on.
Next, sketch in the eye, nose and mouth (drawn in red) levels, and add the ears. Make sure that the nose and mouth lines are very close together.
Erase some of the unnecessary guidelines and start filling in the details of the face. The pupils of his eyes are so small that, unlike most anime characters, they don't have any light glares or shiny parts. Start the nose almost directly below the eyes. Also remember not to draw in the entire nose, because when you see a character straight on, most of the time you'll only see its shadow. The mouth is almost directly below the nose; keep it small, for now. It shouldn't be too much wider than the nose. Also, draw his neck and the details in his ears. His neck is rather thick, and should be directly below his ears.
Add extra shading under his eyes and mouth. Draw in his clothing and turban/hat thing (I'm not sure what its called...^_^). Try to make the fabric look like it overlaps and folds so that it doesn't look like its just plastered onto his head.
Here is the final picture, colored in Adobe Photoshop. You may wish to use different mediums, though; I know that a lot of people prefer traditional mediums, like pencil. Whichever medium you choose, make sure you properly shade your picture.
Next I'm going to go over how to draw Piccolo's face from a 3/4 angle, and without the turban/hat. ^_^ There are less steps for this one, because I personally think its easier than the front view. Start off with a large circle (the head is not so egg shaped without the turban/hat), and draw in the guidelines as shown. Note that there are less guidelines than in the first drawing; I just omitted the very top line because it is unnecesary. Make sure the top horizontal line (drawn in red) is angled slightly, since that is going to be the guideline for the eyes. Go ahead and draw the ears, as well.
Draw in the eyes, eyebrows, nose and mouth. This time, draw the outline of the nose, not just the shadow. The eyebrows should be thick enough that the right one overlaps the left. The pupils are very small and lack any sort of light glares. The mouth is directly below the nose. Make sure that all the features are lined up along the central guideline that runs from the top of the head to the chin. Fill in the detail on the ears, as well.
Next, gently erase the guidelines. Draw the antennae, making them relatively low on the head and distanced wide apart. Add the wrinkles under the eyes and mouth. Draw the upper half portion of his body; as with in the previous picture, the neck starts immediatly below the ears. Clean up your finished sketch as much as you can, and you're almost done. ^_^
Here is the finished version, colored in Adobe Photoshop.
You can make several variations on these two poses, depending upon what type of expression you would like. Try different eye and mouth sizes to express different emotions.