Here is one I tried with GREAT success:

Mark off a square that is five feet from corner to corner. (No, I don't mean diagonally.) Next, find an old, plastic five-gallon bucket that has a lid. Using a 16d nail, poke three holes into the bottom of the bucket. Dig a hole in the middle of the square deep and wide enough to fit the bucket into. Put a handful or two of small rocks in the bottom of the hole. Bury the bucket so that the lip sticks out of the ground about an inch or two. Next, plant the tomato plants of your choice at the corners of your square and plant a good, stout stake and/or cage along with each. If cutworms are a problem in your area a light collar of aluminum foil around the base of each plant will deter them. Then mix up a batch of Miracle-Grow plant food (there is a specific blend for tomatoes but the general vegetable mix is just fine) according to directions. Water your new plants with a bit of it. (I usually water the hole before I put the plant into it.) Then mix up another batch of Miracle-Grow for enough solution to fill the bucket. Put the lid on. Then stand well out of the way because before long you will have more tomatoes than you could ever imagine coming from only four plants. Be sure to check the bucket every few days and refill it to be certain that there is a steady supply of nutrients and moisture available to the plants. Oh, and if you can lay your hands on some straw, use it to mulch the area around the tomato plants to a depth of about four inches. You can use lawn clippings instead as long as you mix them with leaves or something to prevent them from becoming a soggy, slimy mess. If you haven't staked or caged the plants well enough, you will eventually get to a point where you won't be able to reach the bucket anymore. But by then, you'll have so many tomatoes you won't care.