segmenting citrus 

Small citrus like tangerines, mandarin oranges, tangelos and blood oranges can be peeled and sliced into rounds since the inner skin and pith enclosing each segment is tender and mild in flavor.  Larger citrus fruits like navel oranges, grapefruit, lemons and limes usually have a thicker and more fibrous inner membrane that makes the fruit more enjoyable if it is separated from the skin, or segmented.

Segment citrus in advance, and hold the sections of fruit in the refrigerator, in their own juice, for up to one day. 

The technique of segmenting or supreming can transform a salad or vinaigrette by making more visually appealing, and easier--and more pleasant--to eat.