One great way to think more creatively is to switch your perspectives. Try looking at things from the perspective of a child. Or a superhero. Or a rock star. Or your favorite movie character. You can choose anyone — dead or alive, real or fictional, human or not. Just pick someone and step into their shoes for a minute to see things through their eyes. Another word for that is empathy.
You can also switch perspectives physically. Try walking into a new room. Or taking your work outside. Or maybe lying down to think. Or simply standing up for a while instead of staying seated.
Anything that causes you to see things in a new way can ignite your creativity. So give it a try and see what works for you!