I was told by a pro market gardener to cut the plant off at the bottom truss and remove the leaves. Store in a dry well ventilated dark place and the toms will ripen. I've done this for years now and it does seem to work. On the other hand, I've brought some greenies that have fallen from the plants into the kitchen and just left them in the light and they are ripening as well. I guess if they are healthy enough, they will ripen anyway. Hey, nothing wrong with green toms, I eat them any colour.