It seems the whole world is on sale all the time and you can’t go wrong. That is if you follow the Frugal Diva rules. 1. The most expensive item in your closet is the one you never wear – even if it’s reduced by 50% with another 30% off and you have an extra 10% off coupon.  Anything not in your size, in a color you never wear, or for a sport you never play is a reminder that “on sale” doesn’t always mean saving money. 2. Do you really need…