Think of something related to work, school, civic, or leisure activities. Tell it as a story. Give details. The manager wants to see how you define problems, identify options, decide on a solution, handle obstacles, and solve the problem.
The manager wants to know if you have perseverance: I got a D in my first term of algebra. My study skills were all wrong. I joined a study group. By the third term I pulled it up to a B and kept it there.
Don't brag about car racing, sky diving, scuba diving, or any other sport that might be dangerous. They suggest a likelihood of injury and absence from work.
Focus on work, not character weakness. Turn it into a positive, I'm accused of being a workaholic. I like to stay and get caught up on the odds and the ends before I go home.
Continuing education courses suggest growth, ambition, promotability-and may qualify for tuition assistance.
School activities show that you're sociable and that you enjoy being part of a group, and that you can work with other people. This is important in the work place.
If you do, get some help. Enroll in a program.
It's not illegal to ask this question if it has a bearing on the job you are seeking.
Fessing up to failure shows maturity. Avoid examples that might reflect on your ability to do the job.