Choose a site for your organic garden.
Think small, especially at first. A small garden takes less work and fewer materials than a large one. A well-maintained 4' by 4' garden can furnish all of the fresh vegetables that one person will eat.
Don't over-plant. If you're growing food, think in terms of yield, and plan in terms of meals per person.
Even a window box or a few containers can be a starter garden.