The 'ladder' method — two rooks alternately push the opponent's king to the edge of the board. Also known as the linear mate.
King and queen versus a lone king. The queen restricts space; the king helps to deliver mate.
King and rook versus a lone king. King opposition plus a cutting line by the rook.
Tactical pattern: a sequence of discovered checks by bishop and rook lets you pick off the opponent's pieces one by one.