10 decide on the nature of the beast
I tend to think of creatures as ultimately falling into one of two camps: benevolent or menacing. Where the fun begins is muddying the waters a bit. Think through the story of your creature. Is the beast misunderstood? Does it looks menacing yet act benevolent? (Or more frighteningly, look benevolent and hide a secret menace?) Understanding who or what your creature is inside will only serve to make the work stronger.