Studies show people do 90% of their best thinking outside the office and early in the morning or late at night. Schedule your creative tasks accordingly- preferably early in the morning.
Turn off the electronics. We are trained now to ignore people as they talk to us in order to check our cell phones now. Not only is this rude, it is a way to debunk our creative juices and tendencies. If you have to work on a creative project, ditch the cell phone and other electronic devices.