I usually buy avocados in a bag to get a better deal. Sometimes, I don't use the bag before the avocados become overripe. I discovered that avocados freeze well. Who knew?
Pick avocados that yield gently when squeezed. Remove the rind and pit and mash well with a fork.
Add 1 1/2 teaspoons lemon or lime juice per avocado.
Mix well. The juice keeps the avocado from getting brown and icky looking.