Doesn’t matter what it is, how insignificant it appears, or whether anyone notices.
Take the long way home. Learn a new word. Do the exercises at the end of the chapter. Review old photos. Find a better way to solve the same problem.
If we do that daily, we will have experimented over 360 small ideas a year from now. Many will be duds, but we will find at least a dozen gems in between.
Above all, our mental muscles will grow stronger. Facing the next unknown will become just a bit less scary.