Place in the oven - If you are short on time and need a avocado place it in the oven.
Put avocado in foil on a baking sheet. Place in the oven preheated to 200 degrees for 10 minutes.
Have other fruits help - I place the avocados in a bowl, next to bananas or an apple and helps to aid in the process of ripening the avocado. Avocados produce ethylene gas and this helps to soften it.
Brown Paper Bag - You can also place avocado in paper bag as well until the avocado is ripened.
Uncooked Rice - Place avocado in a bowl of uncooked rice to quickly ripen your avocado.