I used to wrap them in newspaper and store them in a single layer on shelves in the basement. Periodically I'd go down and feel em and bring up a couple that felt like they might be ripe. They DO ripen this way, and what a treat to have fresh home grown tomatoes at say Thanksgiving..... for your turkey sandwiches. You have to keep on them though - or you might come to find a bunch of tomato mush if you let them go too long.
Martha