Try to include improvement activities that relate to the job. A wide variety of activities can be mentioned as positive self-improvement. Have some good ones handy to mention.
What have you done to improve your knowledge in the last year?
Can you describe for me a difficult obstacle you have had to overcome? How did you handle it? How do you feel this experience affected your personality or ability?
What do you think are the most important characteristics & abilities a person must possess to become a successful ( )? How do you rate yourself in these areas?