Hold your mango upright and cut on both sides, trying to avoid the pit in the center of the mango. You want to try to cut away from the stem area enough to avoid the pit, but get as much mango flesh as you can. Then you will take the two pieces of mango that have the skin and fruit in it. Create criss cross cuts all over the fruit. I just into cubes. I do long horizontal lines, then vertical. Now take your fruit holding the skin and fold it inside out, pushing all the fruit you cut to push out a bit, and the skin turns in. Then cut off all the fruit and you have perfect squares.