"Things That U Do" is the second single from rapper Jay-Z's 1999 album Vol. 3... Life and Times of S. Carter. It features guest vocals by Mariah Carey and a beat produced by Swizz Beatz. AllMusic's John Bush describes it as an "overblown production," while Steve Juon of RapReviews.com considers it a "commercially aimed song" that "still sounds fresh and original." It was neither heavily promoted nor released as a CD single, causing it to chart lowly.