Also, don't plant in the same place next year if you can help it. Pick out a new site and plant legumes there now.
When they die back, work that stuff into the soil and provide you nitrogen. If you have to use the same area next year,rotate your crop.
Next year, where you have veggies this year, plant legumes.
Also, as your plants die back this year, take that dead plant and put it in your mulch pile. It will breakdown and be the best organic fertilizer.
Also, look here: UncleJim'sWormFarm
Good luck and enjoy. There's nothing like the reward of eating your own stuff!