When climbing upon Safa and Marwah, some pilgrims face the Kabah and gesticulate toward it with their hand while saying Allahu akbar” as if they were saying takbir for salat. This gesticulating is an error because the Prophet (peace be on him) raised his palms only for supplication. Here you may glorify and magnify Allah the Most High, supplicating Him in any words you wish while facing the direction of the Kabah. It is preferable to recite the dhikr which the Prophet (peace be on him) recited at Safa and Marwah.
Accelerating ones pace throughout the entire distance between the two hills. The sunnah is to accelerate ones pace only between the two green posts, while walking at normal pace the remainder of the way.