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. Also in the current financial services environment with lots of regulatory change, upskilling and completing further qualifications is very important so for example if you work in Banking, you decided to complete the QFA qualification as although it may not have been essential for your current role, you realised the market is changing and would give you an added advantage when looking for your next role.