As an HR expert, I would recommend exploring opportunities for freelance work or online gigs in your spare time. Some popular options include freelance writing, graphic design, virtual assistant work, tutoring, or selling handmade crafts online. You could also consider driving for ride-sharing services, delivering food, or renting out a room on Airbnb for extra income. It's important to find something that aligns with your skills and interests to make the most of your time and efforts.