You remember when designer jeans became a thing and wore weird thick jeans from Gap or hideous legging jeans before then.
You put lots of inappropriate pictures on Facebook because you didn't realize it would be opened to everyone and had no concept of "things living on the internet forever" at the time.
You brag about how much you drink (always posting Instagrams of cocktails and wine tasting trips), while young millennials are always bragging about how much they work out (Instagrams of hikes and sneakers and acai bowls).