Thank you, Johnathan, for writing this (albeit 3 years ago)! I've been kicking around the idea of starting an indoor herb garden, since I'm kind of an avid cook and even dried herbs in a bag are getting pricey these days! I'm sad to read dill is only an annual, though: that's become a favorite for use on fish, and we'd likely go through even a 4' tall plant as fast as I can catch fish and finely chop sprigs of dill! haha
It's good to know I'm not the only one that can't keep a rosemary alive, Don! I tried my best for about half a season, but that was all she wrote. In my case, I think it was just over-watering (I didn't realize it was a Mediterranean plant-- all I saw was another evergreen at the time! O_O).
Based on my research, which I'm sure you've already done as well by this point, growing cilantro indoors is about the same as most others: it wants 4-5 hours of sun per day, water when soil is dry to the touch, etc. I looked up tarragon, but to my novice eyes, I can't tell what's what there and there are some odd-looking requirements (some sort of dilution with fish fertilizer?), so I won't purport to have any knowledge on that.