Link it back
Anything you mention in your personal statement should be linked back to skills you’ve developed and how they relate to the course you’re applying for.
As an example, if you mention a part-time job, tell us what transferable skills you have as a result – time management, communication, working under pressure. If you can, tell us how these skills apply to the course you’re wanting to study.
If you’re struggling to think of things you do outside of your studies, it might be time to organise some work experience.