To me, avocado is the bacon of fruits: everything tastes better with avocado! But seriously, how fast do these things go bad? I decided to conduct a little experiment to find the best way to keep avocados fresh after they’ve been cut.  

Remember, avocados that are slightly brown can technically be eaten; but they are generally bitter compared to a ripe avocado. In this case, I recommend cutting off and discarding the bruised sections or brown layers and using whatever is left for cooking or eating. If the avocado flesh is dark brown or stringy you should avoid eating it entirely. Additionally, avocados should not be left at room temperature for more than a few hours at most. Cut avocados left out overnight should always be thrown away.

Read about it on eHow!