The Tomato Club, that tomato growers can join for free, is now up and running on a weekly basis again this season.
It is especially useful for those who grow tomatoes in containers and grow bags. There is a lot of information available - including a weekly quiz - and is well worth joining.
Of course, coming from a short season area - the UK, many of the tips and suggestions relate to tomato growing in a cooler climate, but it is useful to note the varieties that are successful at cooler temperatures and those that ripen early.
Here is the link - Tomato Club.