I have tried various ways to save an avocado, but nothing has worked so well until now. I usually have no need to save my avocado because my boyfriend just eats most of it anyway. But, since he was out of town, I had to get crafty.
Step 1: Cut around the diameter of the avocado, and pull it apart into two halves.
Step 2: You are going to store and save the half with the pit still in. The other half is for eating right away.
Step 3: Wrap the half with the pit intact in plastic wrap so that very minimal air can get in. Then, place in an air-tight container. Place in the fridge.
These two pictures above are what the avocado looked like after storing for 2 days. It does look a little more mushy, and I scraped a few bad spots off, but this method for saving an avocado is much improvement over other methods.