Assemble the following into a bowl:
Peel avocados or carefully spoon out the flesh, keeping the avocado and intact as possible. Cut into large chunks.
Squeeze the juices of orange and lime over avocado.
Season with salt and pepper
Add in chopped onion, tomato, cilantro
Carefully mix together. You don't want the avocado turned into mush.
Season again with salt as needed, perhaps another squeeze of lime.