All the best ideas are borrowed (or stolen). So have you taken any field trips lately? Similar businesses may be the most obvious targets, but also add dis-similar businesses in your region to your list.
Take a good hard look at businesses you visit frequently, scrutinize their ideas. Steal shamelessly!
Compare your work to others’. Try to find points in common with a bizarrely different business. Open your eyes to all the world of possiblities.