Clap (Shinto) twice - to say more concretely, put both hands together in front of the chest, slide down the right hand a little (until the first joint of the left hand,) clap the hands twice to make a sound, slide up the right hand to the original place, pray, and drop down both hands.
拍手(神道)を二度打つ-より具体的には、両手を胸の高さで揃えて合わせ、右手を下方向に少し（指の第一関節ほど）ずらし、その状態で両手を二度打ち合わせて音を出し、ずらした右手を再び揃えて祈念を込め、最後に両手を下ろす