1) Flip your pillow case: When you sleep, you drool, perspire and sometimes sweat. This goes directly onto your pillow case and sheets, so it's a must to keep your pillow clean.
To keep it clean, every two weeks you should vacuum it with a turbo brush. Then wash it on hot (or follow care instructions), shake the pillow out and let dry naturally in sunlight. This regular cleaning will help reduce the bacteria, and nasties in the pillow.
During the week, between washing the sheets, turn your pillowcase inside out and upside down, so that you are getting the side that your face hasn't been touching. You will be able to notice that this makes a difference in getting clearer skin.