Deal of the Day This is the one thing on sale (out of many things on sale we write about) you should buy today. Read more here . Photo-Illustration: The Strategist; Photo: Retailer We first learned about this ingenious personal fan two summers ago from Strategist contributor Annachiara Barretto-Grignoli, who toted it all around Milan in 101-degree heat to excellent results. I brought mine on a weeklong trip to New York City last month and would have perished during my muggy, hour-long subway