If you’re strictly looking for free items, there are several sites that will simply list every deal you can get that week for free by combining offers or that will send you free samples of various products in the mail.
A great site that lists free items marvelcoupons which goes through the various deals and circulars on any given week and breaks out the specific items you can get for free at national retailers. If you click on one of the deals listed on the site, you’ll get detailed instructions on exactly how to get the freebie, including where you can find the coupon and how to stack deals.
If you’re looking for free product samples, check out Stadiumgoodscoupons, which lists items that you can get for free. Many of the offers require you to “like” pages on the companies' social media pages or to sign up for loyalty programs, but the site gives you details about what’s required to get each free sample.