I use a drip system. I have a timer to turn it on at set times. I then have a set of valves at different places in the garden so that I can control what gets watered. I have connectors so that I can customize the set up each year, each connector also has a valve before it.
I find this system to be the most efficient in water usage and my time.Plus I do not water where the crops are not thus cutting down on weeding.