How do you search for freebies?

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I am sorta new to freebies and I search the brands of products I use websites to find them. I would like to know what way you search because I have determined that I really like getting free samples/coupons whatever. Although, I totally believe that my mailman hates me 100% because he has to bundle them up and my mailbox is full (as well as a pile on my porch) almost every day. But, lately (the last few days) I have only gotten a few frees and I am having withdraws. My husband laughs but I am glad I have this addiction (as well as coupons) instead of drugs or something much worse. Please let me know, I really want to know!!!