The Prophet Muhammad (blessings and peace of Allah be upon him) used to say this du`a for wearing new clothes: “Allahumma laka al-hamd, anta kasawtanihi, as-aluka min khayrihi wa khayri ma suni‘a lah, wa a‘udhi bika min sharrihi wa sharri ma suni‘a lah.”

We say Bismillah before any task for two reasons: 1- seeking blessing by beginning in the name of Allah, 2- To make our beginning exclusively in the name of Allah.

Two hadiths have been reported form Prophet Muhammad (peace and blessings be upon him) about the virtues and benefits of Surah Taha. However, there are many weak hadiths about the virtues of the Surah. For more, please see the detailed answer.