We cut back "the suckers" to force all nutrients into the fruit on a religious basis. My plants do look quite thin and sickly when done right.
We mulch around the tomato plants and run a buried soaker hose for watering. Use straw or coca bean husk mulch to keep any soil from splashing up on the plants. Once soil splashes up on the plant you risk the chance of having infected the plant with mosaic virus that is present in the soil. At that point your plants leaves and fruit will have a scars and scab like lesions.
In my current garden I had 34 "Better Boy" plants my first year that I started from seed inside. We had 5 large wheel barrels full of tomatoes to give away at the end of the season, that was with no pruning too. Now we run only a handful of pruned plants that produces more than we need.
Some guidelines:
Soil Requirements
Tomatoes can be grown on many different soil types, but a deep, loamy soil, well-drained and supplied with organic matter and nutrients is most suitable. As with most garden vegetables, tomatoes grow best in a slightly acid soil with a pH of 6.2 to 6.8.
Fertilizer
Tomatoes respond well to fertilizer applications, especially phosphorus. Excess nitrogen fertilizer can result in plants with extremely vigorous vine growth but little fruit production. Apply 2-1/2 to 3 pounds of a complete fertilizer, such as 5-10-10, 5-20-20, or 8-16-16 per 100 square feet of garden area. Work the fertilizer into the soil about 2 weeks before planting. An additional sidedressing of a nitrogen fertilizer may be desirable after the first cluster of flowers have set fruit.
Video on pruning.
http://www.finegardening.com/how-to/vid ... atoes.aspx
My garden is more compost than anything after the years. I started with 20 cubic yards of black dirt but have added and created so much compost over the years the whole thing is an elevated compost pile. At this point just about everything I try growing is much larger than normal. Soil is the key to success in gardening. We don't fertilize our plants the compost provides most nutrient need we just keep thing watered as needed.