Dua For Concentration
"Salla-l-laahu alaa Muhammad wa aal-e Muhammad. Allahumma inni
as'aluka yaa mudhakkira-l khayr wa faa'ilahu wa-l-aamimira bihi
dhakir-ni maa ansaani-hi-shaytan."
"Blessings of god be upon Muhammad and his progeny. O god, I ask
you, the one who mentions goodness and actualizes it and commands
it, remind me of that which the shaytan makes me forget."