Turn cards from the stock to the waste pile; the top waste card is playable.; Draw one or draw three — draw-three is markedly harder and is the traditional form.; When the stock empties the waste is turned over to reform it. Whether this is unlimited or capped is the single biggest difficulty set...
Why people argue about this
People often think you can only draw one card from the waste pile at a time, forgetting that sometimes you're supposed to draw three cards as per tradition, which is harder but more exciting. This leads to misunderstandings about when and how many cards should be drawn, especially during those crucial final moments of the game where every move counts.