Harbor Freight bonus coupons
If you subscribe to the Harbor Freight email notices, they send an email with about 20 coupons once or twice a week. Below each coupon is a link to click to print that coupon. If you click it, it opens a new browser window with that coupon and another coupon, usually a related item. Some of the related items are very good discounts, sometimes 50% off or more, and other times they are not so hot, such as $1.00 off a $7.99 item.
For example, in the email that came out earlier this week, there is a coupon for a 10 piece set of 3/8" drive deep color-coded socket set for $9.99, regularly $17.99. If you click on the link to print this coupon, it opens a new browser window with this coupon, and a second coupon for a 3/8" drive torque wrench for $11.99, regular $32.99, or 63% off. Most of the bonus coupons aren't this large a discount, though. I was going to post the link here, but I see it has a customer number in the link, which may be linked to my account. It would be best to subscribe to the emails and use the links from the email.