This is an exercise that can make your thinking more creative by stimulating all the representational systems and is also good for the muscles of the eyes.

Pick an object far away from you and imagine it is the center of a large clock. Keep your head and shoulders still and carefully move your eyes as far as they will comfortably go in the 9 o'clock direction, as if you were trying to see your left ear. Keep the muscles stretched for a couple of seconds, don't look at anything in particular and then bring your eyes back to the center of the clock. Now do the same for 10 o'clock, 11 o'clock and 12 o'clock, where you will be looking up towards your forhead. Continue around the clock until you have covered every hour. Do it slowly and carefully, don't try and force anything and if it is painful or you feel any discomfort, stop, take a rest and continue another time.