If you are really short of ideas, just check one of the existing popular services which you use and see if you can offer the same at a cheaper rate. For ex: if

If you are really short of ideas, just check one of the existing popular services which you use and see if you can offer the same at a cheaper rate. For ex: if a 'package delivery service' is charging $1 for delivering a package, see if you can provide the same service 50 cents cheaper, while maintaining the quality of service. You don't necessarily need to burn cash / offer insane discounts to achieve it. Cost reduction can also be achieved by improving the supply chain to make it more efficient, thereby reducing cost. For ex: replacing paid software with free/open source alternatives, automating some of the mundane tasks etc.