National Highway Authority(NHA) Officer Question:

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.
Employers look for applicants who are goal-oriented. Show a desire for continuous learning by listing hobbies non-work related. Regardless of what hobbies you choose to showcase, remember that the goal is to prove self-sufficiency, time management, and motivation.

Everyone should learn from his mistake. I always try to consult my mistakes with my kith and kin especially with elderly and experienced person.
I enrolled myself into a course useful for the next version of our current project. I attended seminars on personal development and managerial skills improvement.