Need some help figuring out how to pick the perfect avocado? Learn how with this green grocer's guide. As you might expect, once you know what to look, feel and smell for, the process of selecting ripe avocados is a simple one. So simple, in fact, that this clip clocks in at just 26 seconds. For more information on how to tell when an avocado is ready to be eaten on the day of purchase, take a look.