It's difficult to get your creative juices flowing if you're always being practical, following rules, afraid to make mistakes, not looking into outside areas, or under the influence of any of the other mental locks.
Open your mind up to things that have no connection with the problem you're trying to solve: subscribe to an unusual magazine; spend a morning at an elementary school; go to work two hours early; test drive an exotic car; attend a city council meeting; ...try an Indonesian recipe.
Am I Getting Lazy? Am I Too Busy? Am I Becoming Arrogant? Am I Getting Timid? If you answer 'yes' to any one of these questions, that's your warning to Kick that attitude!