Shopping at 3M
1. Sign Up For Multiple Email Addresses - Use a couple different email address to accumulate more 3M promo codes. Many of the big retailers will come out with single-use coupon codes and this will increase your chances of savings.
2. Patience Pays Off - Take your time and revisit the site a couple hours later; 3M will send you an additional promotion to entice you to complete your order.
3. US Military Discounts - 3M often comes out with special and discount for military personnel and students. It is recommended to email their customer service department browse through the educational section online.