Travel The cheapest-flight formula is simple: book around 60 days before departure, search on Tuesday afternoon, and use incognito mode. Here's why this timing works and the search rules to follow.
Technology The little bar you place between your groceries and the next shopper's isn't a random idea — it's a patented product with an official name and a surprising history.
Technology Before you do the math in your head, try this: your phone's calculator can find a discounted price in one tap. Just type the price, minus, the percent, then %.