Worldly wealth rejected

Narrated Anas: The Prophet said, "Allah will say to that person of the (Hell) Fire who will receive the least punishment, 'If you had everything on the earth, would you give it as a ransom to free yourself (i.e. save yourself from this Fire)?' He will say, 'Yes.' Then Allah will say, 'While you were in the backbone of Adam, I asked you much less than this, i.e. not to worship others besides Me, but you insisted on worshipping others besides me"     ‎Sahih Bukhari Volume 4, Book 55, Number 551

Best Deed: To offer prayer at its appointed time

"When, the son of Adam recites the Ayat of Sajdah (prostration) and then falls down in prostration, the Satan goes into seclusion and weeps and says: Alas, and in the narration of Abu Kuraib the words are: Woe unto me, the son of Adam was commanded to prostrate, and he prostrated and Paradise was entitled to him and I was commanded to prostrate, but I refused and am doomed to Hell." 
[Sahih Muslim : Book 1 Kitab Al-Iman, Number 144]

It is narrated on the authority of 'Abdullah b. Mas'ud (Radi Allah Anhu) that he observed. I asked the Messenger of Allah (sal-allahu-alleihi-wasallam) which deed was the best. He (the Holy Prophet) replied: Prayer at its appointed hour. I (again) said: Then what? He (the Holy Prophet) replied: Kindness to the parents. I (again) said: Then what? He replied: Earnest endeavour (Jihad) in the cause of Allah. And I would have not ceased asking more questions but out of regard (for his feelings).[Sahih Muslim : Book 1 Kitab Al-Iman, Number 151]