Shopping at 23andMe
1. Sign Up For Multiple Email Addresses - Use a couple different email address to accumulate more 23andMe promo codes. Many of the big retailers will come out with single-use coupon codes and this will increase your chances of savings.
2. Newsletter Signup - 23andMe will consistently send out newsletters where you can find free coupon codes to save on your order.
3. Buy a Discounted Gift Card - There are a few places online, such as GiftCardGranny.com, where you can buy discounted 23andMe gift cards to save money on your order.