Consult with local gardeners and your county extension agent to learn which varieties are most productive in your local area, then order your seeds or transplants accordingly.
Prepare the soil under your plot with plenty of organic material such as peat, and if your summers are dry add moisture-retaining perlite or vermiculite. Plots in direct sun need lots of water, and these steps help the soil retain moisture.
Observe the track of the sun across your current or former garden plot, and note any shadier areas.
Plant the sunniest areas with vegetables that appreciate the greatest amount of light and heat. These include tomatoes, eggplants, peppers, cucumbers and squashes.
Position taller plants, such as corn and staked beans, at the northern side of the sunny area where they can't shade your most sun-loving plants.
Put in root vegetables such as beets, potatoes, carrots and turnips where they receive sun most of the time, but less so than in the center of the plot. They will tolerate some shade quite happily.
Reserve the outer edges of the plot for leafy greens such as lettuce, kale, chard or spinach, which are prone to "bolting," or going to seed, if they receive too much sun. Many herbs, such as cilantro and dill, will produce longer if kept out of direct sun for part of the day.
Water your plot lavishly, especially when the vegetables are maturing, for best results in sunny areas. Be consistent, so the plants don't dry out. Tomatoes, for example, split if allowed to become water-stressed and then watered liberally.