One of the most important things in the vegetable garden is crop rotation. Doing this simple technique (no matter how large or small your garden) makes your garden healthier and better able to withstand pests and diseases. By NOT growing the same class of plants in the same place year after year, you break up the life cycles of the pest problems and allow the soil to rest.
Here is a very simple system based on the amount of plant food each plant group requires.
That's it - your vegetable garden can be healthier and more productive by simply following this simple crop rotation system.