Everyone is creative in their own capacity and skill. We all think about problems and their possible solutions. But ideas done come easy, especially when you are seeking an idea that can translate into a product or a service or (for the enterprising kind) a star-up.
This article on HBR gives some simple, yet constructive and priming activities that will charge you grey matter to think laterally and out-of-the-box when seeking solutions and directions that are not yet defined in the conventional patterns of actionable.
Three exercises have been listed. There are more in the published book (linked in the article).
Have a go at it.