Hose or drippers at the base so the ground is wet, not the leaves.
We did something different this year. Drilled hole in a piece of PVC and buried that (about 2 feet under the dirt). Just take a hose and put it in the pipe. The water goes to the roots and is not wasted or evaporated due to watering from above. Use a lot less water and the plants seem to love this.
Good article using buried pvc for watering:
I use a soaker hose every morning for 20 - 30 minutes. This allows me to water the soil (and roots) and not the leafs. I started watering with a soaker hose two years ago and it has made a remarkable difference in my harvests.