Blueberries are rich in antioxidants, which have been shown to fight certain types of cancer. The ginger aids digestion, and sets a South Pacific mood when combined with pineapple.
Cut large produce into chunks, and remove big seeds or pits. Don't worry about those in fruits like apples and pears -- the juicer will filter them out. To combine several fruits and vegetables, alternate between soft pieces and hard ones. Finish with the latter to push through anything that's stuck.