Plant taller plants on the north side of the garden so they don't shade the shorter ones. Legumes include peas, beans, and limas. Brassicas include cabbage, kale, broccoli, collards, cauliflower, and brussels sprouts. Tomatoes, peppers, potatoes, and eggplant are nightshades. Root vegetables include beets, carrots, onions, and garlic.
Leafy greens are spinach and lettuce.
Corn is in a category by itself. For a more attractive garden, add a little color from herbs or edible flowers. Marigolds, nasturtiums, and pansies are popular. By far the most economical way to grow vegetables is from seed. Seed catalogs and garden centers have an abundance of seeds from which to choose.