Tomorrow, in the incredible unlikelihood that anyone has forgotten, is tax day. If you'll be joining the queue at the post office that night or already know that you'll be writing Uncle Sam a hefty check, you can stop reading now. If, on the other hand, you're wondering what to do with your windfall ($600! woohoo!), we have a couple of suggestions. On the very date that America's taxes are due, Christie's will be auctioning off $60 million worth of Belle Époque and Art Deco-era jewels (like this lapis lazuli, diamond, and enamel vanity case, above). If, in your post form-filling-out state, that number doesn't stupefy you, the next day, the auction house is putting author Danielle Steele's collection of baubles on the block. Considering she's sold about a billion books, we're guessing she's assembled one impressive jewelry box.