I have a questionable habit of saying "Woot! Woot!" a couple times a day so naturally I adore this Woot Note Set ($6).
"Woot" ("w00t" is the real geek spelling) is a sort of cry of joy and celebration used by online gamers. It's used in place of saying "yay!" or "yesssss!" Oddly enough, it was named word of the year by Merriam-Webster in 2007.