http://www.amazon.com/gp/feature.html?t=slickdeals&tag=slickdea
提示：eligible products就在那一页，不是所有东西
To enjoy free one day shipping on qualifying items:
1. Add eligible item(s) to your Shopping Cart.
2. Ship your item(s) to a single address.
3. IMPORTANT: You must select One-Day Shipping at checkout.
PRIME members: Select One-Day shipping for $3.99.
4. You must select your Discover Card as your method of payment.
5. Enter promo code "DSCVRSHP" in the "Have any gift certificates or
promotional claim codes?" area and click the "Apply" button.
6. The shipping discount will be reflected in the Order Summary.
7. Enjoy free shipping on qualified items shipped to your specified address.
Offer valid from February 15th, 2012 through March 31st, 2012 or while
promotional funds last. Void where prohibited. Applies to qualifying
products shipped to delivery addresses in the continental US only. Excludes
Alaska and Hawaii. Geographic shipping restrictions may apply to particular
products. Applies to APO/FPO addresses when using a United States ZIP Code
only
Credit to slickdeals: http://slickdeals.net/f/3958430-Free-One-Day-Shipping-Amazon-wi
