It's all very well to say "...his bright blue eyes twinkled beneath his brown hair" in third person. But my question is, what are some ways to give the reader an idea of the characters physical appearence when you're writing in first person POV? As in, describing the character you're writing as. Oh, and especially when they're not the type of character to be staring in a mirror examining all the little things about there appearence: a.k.a. a guy.