Indoor Herb Garden Tips?

I have started growing oregano, thyme, parsley, rosemary, and basil in small terra-cotta pots on my dresser. They are right by a west-facing window, and the room also has a window facing north, both of which I keep the blinds open on all day. I live in Minnesota, and I generally keep the room between 60 and 75 degrees. I would like to know ho much water I should give them and any other tips you might have to help them thrive. Thanks!