Watering at midday because that is when you remembered
Midday irrigation loses a large share of the water to evaporation before it reaches the roots, and droplets on foliage under full sun can scorch leaves. The fix is not discipline but automation: a controller or tap timer set to finish its cycle around dawn waters better than any human ever will.
Never touching the irrigation controller after handover
A garden running its winter schedule in July is being underwatered by half; a summer schedule left running in January drowns roots and breeds fungus. The controller schedule should change at least four times a year. If you do not know how yours works, have a technician walk you through it once — it is a ten-minute lesson.
Laying new turf straight onto old ground
Paspalum rolls dropped onto compacted, salty or debris-filled ground will green up for a fortnight and then fail in patches. Proper re-turfing includes stripping the old surface, adding a layer of clean sweet soil, levelling, and verifying sprinkler coverage before the first roll goes down. If a quote does not mention soil preparation, it is a quote for a temporary lawn.