For sectioning a grapefruit, you will need a cutting board and a large chef knife.

Begin by cutting the end off the grapefruit far enough in to trim all of the white pith from the end.

Do the same to the other end.

Turn the grapefruit onto one of the cut ends. Following the natural curve, cut away the rind and all of the white pith.

Continue all the way around the fruit.

Go back around and clean up any large pieces of white pith until only the citrus sections are exposed.

Place the cleaned fruit in the palm of your hand and carefully cut one side of the section. Use the dividing pith as a guide.

Cut the other side and remove the section.

Continue all the way around the grapefruit until all the sections are cut away.

If you are storing the sections for later use, squeeze the juice from the grapefruit refuse.