For my trip to New York last week, I packed two pairs of perfect everyday-running-around jeans (you can find them here and here), but, weirdly, nothing inspiring to go with! So, one day, I cleverly converted this balloon-sleeve Zara dress into a blouse, tucking it into my waistband and then I snapped up this Harvey Faircloth striped top that I will work over and over and over again. Next time, however, I will be better prepared, thanks to Leia Sfez's Instagram account, rife with loads of…