Atkins offers its Atkins Low Carb Weight Loss Program Quick-Start Online Kit bundled with a $5-off Atkins Products coupon for free when you register your name, email, username, and password. That's a savings of at least $5. It provides a list of low carb meals, foods, and recipes designed for the Atkins 20 and 40 diets.

Note: the $5 coupon is broken down to $2 off bars and shakes, $2 off at Atkins.com, and $1 off an Atkins frozen entree.