Wow, you don't need your A/C at night??? Sounds lovely!
Iced tea is always a great plan. Drink lots of it with tons of ice!
Anything outside around here is best done before 8 AM (9-10 if it's in the shade) or else after dark in the evening.
Eat lots of salads and other 'cool' stuff, no heavy meals especially at lunch.
Veggies are great to nibble on when it's hot.
If you're going to BBQ, do it after dark when it's cooler (even around here it gets down in the 80s at night)
Leave your car windows down about an inch or so to prevent too much heat build up that can crack windshields