Look for avocados that are not bruised or overly soft, and that have no gouges or broken skin. If you won't be using the avocado for three or four days, choose firm avocados. If you need to use the avocados right away, choose a ripe avocado that yields to gentle pressure when cradled in your hand.
Store avocados at room temperature until they ripen, then refrigerate and use within three days. Refrigeration slows avocado ripening.