If you’re superstitious, proceed with caution this freaky weekend.

USE
Target Your Arms Kit
What: Spin these miniature hula hoops around your biceps for stronger, more toned arms.
Why: C’mon baby, do the twist.
Where: Online at gaiam.com.

READ
Food Cures
What: Renowned nutritionist Joy Bauer shares her edible remedies for PMS, migraines, and more.
Why: An apple a day doesn’t always cut it.
Where: Online at amazon.com. 

SHOP
Azalea Sale
What: Brands like Twinkle by Wenlan, Corey Lynn Calter, and Sass & Bide up to 75 percent off.
Why: Out with the old, in with the new.
Where: Online at azaleasf.com. 

DO
BookCrossing
What: Release your old reads and watch them travel the world, thanks to book-tracking site.
Why: Your bookshelf runneth over.
Where: Online at bookcrossing.com. 

OptOutPrescreen
What: Remove your name from mailing lists for preapproved credit and insurance.
Why: Save some trees; save some hassle.
Where: Online at optoutprescreen.com.