Watering

I reckon to water newly planted things every couple of days for about a week to ten days in hot weather.
Brassicas get a a bit every day, sometimes twice, simply because flea beetles which can strip out new plants in a matter of hours don't like the high humidity.
After that everything gets a good dousing once a week and a feed once a week and an extra drink if it looks thirsty.
I've learned that it doesn't seem to matter if all the leaves collapse on courgettes or aubergines or whatever in the middle of the day, they'll be fine once the sun is off them again.