[denton-scratch]

I use lemon juice. It works, inasmuch as anything works.

I mainly use avocados to make guacamole, and my recipe includes lemon juice. If there's half an avocado left over, I splash lemon juice on, then wrap it in plastic film and refrigerate it.

[mckn1ght]

I do this as well, and also with guacamole I’m going to hold, after putting it in a container I’ll smooth the surface, squeeze lemon/lime juice on top and press plastic wrap down onto it to keep a film of juice on the surface. Keeps it from browning and adds to the flavor for next time, when you can just stir it in.