Tomato season in on - YEAH!!! However, if you have some tomatoes that have fallen off and are green, I have a trick for you. Put them in an empty egg carton that has the lid still attached. Close the lid and let them sit on the counter.
The tomatoes (along with other fruits) releases a gas that helps them ripen. This is why leaving the lid closed is so important. This is also why grape bags have holes in them to let the gas escape.
If you need other fruit to ripen. You can place them in a bag with no holes and let them sit out on the counter as well. (My mom used to use brown paper bags so that the fruit wouldn't stay moist on the outside and rot).