When climbing upon Safa and Marwah, some
pilgrims face the K'abah 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 K'abah. It is preferable to
recite the dhikr which the Prophet (peace be on him) recited
at Safa and Marwah.
Accelerating one's pace throughout the entire distance
between the two hills. The sunnah is to accelerate one's
pace only between the two green posts, while walking at
normal pace the remainder of the way.