When your sod is installed, you should immediately begin watering it twice daily for one week then once daily with an inch of water (about fifteen to twenty minutes) during each session until the sod is rooted in the soil. This should only take a few weeks and is essential for a successful sod lawn. The soil should not ever dry out before the roots grow into the soil.
The best time to water your lawn is during the early morning (6am -9am) or evening (6pm-9pm) and not during the day. This is because less water is evaporated and your lawn will use the water more efficiently. Be aware that watering during the day will not damage your sod, but you may have to water longer.
Mowing: Determine mower timing by height of grass not the calendar. Cut no more than 1/2″ of grass at a time. If you want 3″ grass, wait till it is 3.5″, then mow.