Simplify, seems to be my mode of living these days. In a hot city, sometimes it's just best to get down-to-basics. Short of skipping out of my apartment, in underwear as outerwear every day - appropriate or nah? - my version of City Summer Survival Mode, is to wear as little as possible while still being demure and understated (naturally).
If there's anything to be said for making your life easier, it's to keep your wardrobe 'Flawless', like Bey, but more so suggesting clean lines, strictly black and white (kidding, kind of), and airy textures to keep cool in, like organic cottons.