Lifehacker has a great article entitled Never forget to water your garden again with an automated drip system
“The end result is that I don’t have to worry too much day-to-day about my vegetables like I did last year. A basic system goes together in just an hour or two, and it’s easy to expand upon. Since I built my first system a few weeks ago for the vegetable beds, I’ve expanded it to cover the entire front and backyard, in a three-zone system that waters ornamental plants on a separate schedule from the edible plants. My next project is to test out the larger sprinkler heads for lawn coverage. A friend recently set up a similar system, and let me know he was also impressed with the ease of setup, low cost, and flexible system.
If you have a Lowe’s or Home Depot nearby, check out their drip irrigation section for free guides. The system I used came with a friendly introduction to planning and installing drip systems. They also explain what each type of drip head can do.”