I've finished four pieces of short fiction in the past two weeks, and I've been able to look at the characters in those pieces and give them more dimension. I'm not rushing my novel; instead I'm taking the time to think my characters out more. That should help me to write more developed characters from the beginning.
One exercise the book had me do was to choose a character from a list, a character trait, and a situation for the character to react to. I chose a germaphobic celebrity chef who has a baby left on his front porch. I had fun with the exercise, so I spent a few minutes jazzing up the initial draft and decided to share it. Enjoy.