. . . you find yourself buying things you absolutely don't need or even want just because they are "an incredible deal!"
. . .your mail each day consists of "bill, freebie, junk, junk, junk, junk, junk, freebie, rebate check, letter from mom" and the freebies get opened first, followed by the rebate check.
. . . you've learned that your phone has a PAGE feature allowing you to page your significant other upstairs and tell him/her about the incredible deal on SPOOFEE instead of walking all the way up there evey five minutes!