The best place to start with a business idea is to look for the problems people are trying to solve and that aren’t being solved or partly being solved by existing competitors in the market.
What if there was a market for people who didn’t want to sign a 24 month contract with their phone company – and you could provide that option?
What if there were a lot of local dog owners in your area, but nowhere people could leave their dogs for the day when they were at work?
Great businesses solve problems, and add value to people’s lives through that solution. The value they add translates into profit if you can deliver more value than the cost of the product or service to produce.