Here's another nice exercise to learn how to draw cartoon monsters. Follow this step by step tutorial carefully, slow the animation so you can catch all the details.
Step 1
I've used a grey pencil to do the guidelines. This monster is three eyed. The head is a nice curve. The rest of the parts are a nice set of simple curves for the body, hands and legs.
Step 2
Using a thick black pencil fill in the details for the monster. This monster has its tongue out. Dress up your little monster. With a white pencil, remove the guidelines.
Step 3
Using an airbrush, I have coloured in the face and clothes. You can touch up the sketch with the pencil tool. Let your imagination run wild and you will end up with a riot of colours. Have fun!