I've planted gardens every year since 1980, when Sue and I shared our first garden in New Hampshire. But I have to say that (for tomatoes, anyway), 2010 will go down as a disaster. The one-two punch of endless days over 90 degrees (which prevented tomato fruit set) and humidity-enabled Septoria Leaf Spot disease (which led to very unhealthy plants) was just too much.
It isn't so much off to the drawing board - one year out of 30 isn't a trend, it is a unique event (maybe). Still, next year I will be more thorough in washing my pots with bleach, and try to get things out and growing at least a month earlier. You can't guarantee success, but you can learn as you go along and make changes based on experience.
Here is my driveway as of today - and shows that 2010 wasn't a total disaster. The deer kept away for most of the summer (they did find our sweet peppers a few weeks ago, but we had a good crop before the attack). And the eggplant and hot pepper harvest/yield was just amazing. In fact, yesterday we gave away eggplant to friends, baked some slabs then froze them for a mid-winter eggplant parmesan, and created a wonderful Ratatouille for dinner (many dinners, actually...froze lots of that as well).