1.Plan Sufficient Space.
Our yearly veggies garden is around 1/10th of an acre and gets nearly 1/3rd of our food. The remainder of our food includes eggs, duck, shiitake, and perennial fruits and veggies produced on two extra acres.
Depending on whom you question, what you consume, and your growing techniques, it takes between ¼ to 2 acres of well-controlled, fertile ground to serve a family of 4. You can begin little and expand yearly. However, if food self-sufficiency is your purpose, then be practical in your space planning.