You never know when a little double-stick tape might come in handy. I feel like every time I could use some, I don't have any! Enter Her Look Matchsticks, $10, a little matchbook of clear double-stick tape strips that is compact enough to fit in a clutch, with cute packing to boot.
Those drat rogue bra straps that want to peek out, slingback straps that slip down, and tops that won't stay in place like they're supposed to all cause me much more grief than necessary. I'd much rather worry about other things!