With the knife still in the avocado, twist it slightly to separate the two halves.
Place the avocado half with the pit onto a hard surface, pit side up. Strike the pit with the blade of the knife with enough force so the knife is embedded in the pit. If you pick up the knife, the avocado half should stick to the blade.
You can also make slices and peel off the skin.
Hold one half of the avocado in your hand. Insert a spoon between the skin and the pulp (the edible portion of the avocado). Gently remove the pulp by running the spoon around the edge keeping it as close to the skin as possible. Repeat with other half.
If you're careful, you can remove the pulp in one piece. Scrape out any remaining pulp that may be attached to the skin. Use the spoon to remove any discolored spots on the pulp (these will have an off color taste).