When you want to become creative, your first step is slow down. Relax. Play some calming music, or simply close your eyes, take a few deep breaths, and daydream for a few minutes.
Don't try to rush this initial slowing down. You're aiming to drop out of the world of your usual concerns. Fantasize. Imagine you're living on tropical island, where your every wish is catered for. Make this daydreaming scenario as real as you can. Hear the waves, let the sand sift through your fingers, and feel the warmth of the sun on your skin.
If you feel guilty because you think you're wasting time when you take a few minutes to daydream, your own experience will show you that you're NOT wasting time when you daydream, you're increasing your productivity. Our rush-rush lifestyle chokes off creativity. Only relaxation will allow your creativity to bubble up and will get you into a true creative state. (Note: such a state is also called a "peak experience" or "flow state".)