Scott at 2012-09-18 21:24:44:
This surprises me, no one speaks up for the value of character interviews. I think sitting down with characters is an incredibly important tactic. It can give you more of a sense of a character, allow you to hear their voice, and surface important insights.
Here is a simple technique: Go to your work station, shut the door, turn off your phone, cut off web access, open a Word doc, put your fingers on your keyboard, close your eyes, bring the character to mind, take a deep breath and start 'talking' with them. 30 minutes. No stopping. Your mind may wander. No problem. Just come back to the interview. Don't worry about correcting typos or even checking what you're typing. You're going for a direct download from whatever cognitive state you have where characters come to life.
Do this with every primary character. I'll bet you will benefit from the exercise greatly.