What can I do to help my avocados ripen?
The California Avocado Commission suggestions:



To ripen a California Avocado, place the fruit in a plain brown paper bag and store at room temperature 65-75° until ready to eat (usually two to five days).
Including an apple or banana in the bag accelerates the process because these fruits give off ethylene gas, a ripening reagent.
Soft ripe fruit can be refrigerated until it is eaten, but not for more than two or three days.
The California Avocado Commission does not recommend using a microwave to accelerate the ripening process.