Peopleoften forget the importance of the simple yet powerful dua (supplication) - Istighfar i.e., saying "Astaghfirullah" (I seek forgiveness of Allah). Prophet Muhammad (SallAllahu Alayhi Wa Sallam) recited this at least 100 times a day. Istighfar opens the door of mercy. Istighfar opens the door of knowledge.
Whenwe say Astaghfirullah (I seek Allah's forgiveness), when we say La hawla wa la quwwata illa billah (There is no power nor might except with Allah), all this is dhikr. Our Prophet (saw) also said: "(There are) Two words, (which are) light on the tongue, heavy on the Scale and beloved to The Most Gracious: "SubhaanAllaahi wa bihamdihi.
WGYc.