I am gardening in 4x12 boxes that my husband built out of pallet wood. We are growing corn, beans (lima and green), peas, carrots, green peppers, onions, tomatoes of several variaties, yellow squash, and zucchini. We are also letting our kids grow watermelon, catalope, and pumpkins. All this is arranged in a 20x70 part of our front yard. Our backyard goes straight up hill and is not condusive to growing much but weeds! In smaller beds we have lettuce, radishes, spinach, and herbs.
I am not expert but I listened to what my parents, aunts and uncles, and helpful neighbors said. Then I went to the library check out some books. I bought the Square Foot Gardener and read same. We kept records of what we did and even now have written our suggestions for better results next year. I am in Zone 6 and already have put up some of the zucchini. And of course made bread.
There two things when it comes to watering. Water out of the sun. Water on the leaves acts as a magnifying glass and will hurt your plant. Water close to the roots, not from above and don't wash them out.
My next project is to set up a rain barrel to catch run off from my house to use on the garden. If anyone has a tip about that let me know!