[ninjavis]

Find something that frustrates people and build something that solves it for them.

Innovate on something that people do every single day. For example, people communicate every day, sleep, eat, exercise, work, entertain, use consumables. Make a list of literally anything you can think of that people do every day, and more than often ideas and issues to solve pop up.

LISTEN to people as they "wish upon things" every now and then. Ex. "I wish someone would xyz.. ", "I wish there was a way to xyz...", "When will there be xyz...". These types of comments are a goldmine for choosing a theme.

Hope I answered your question and that this helps, my friend!