There's a growing trend of on-demand businesses that cater to our need for convenience and instant gratification. Some brilliant ideas for this sector include on-demand food delivery services, freelance service platforms, and health & wellness services like personal trainers or dietitians. There's also a need for on-demand tutoring or coaching services, as well as home services like cleaning or gardening. The key to success in this space is identifying a specific customer need and offering a timely, convenient solution. With the right approach, an on-demand business can offer flexibility to both the service provider and customer, creating a win-win situation.