This Just In: A random idea from Andorin's brain.
I don't know if any of you have taken the variety of personality tests that are available online, but they can be pretty fun. There are ones like
Jung Typology Test and
The Animal in You test which are both pretty good.
But what if you answered some of the questions from the mindset of your character? You might discover something new about your character or be given an idea on how to develop them better. I'm a strong believer in that asking questions of your character will make them more interesting, relatable, and realistic.
I'd be really curious to see what you all think of this idea. If you try it, feel free to link the results in this thread.
WARNING: Don't get so caught up in understanding your character that you fail to write your story. You'll probably discover ten times more about your character through writing them into impossible situations* where they have to make tough decisions.
*Impossible in the sense of two equally bad decisions.