"Amr Bil-Ma'aroof begins at home..."

Prophet Muhammed (saws) and his 3 precious commandments to Ali.

1. O Ali, whenever you look in a mirror, you should say ‘Allahu Akbar’ three times, and say: O Allah, Better my morals in the same way You bettered my creation.
2. O Ali, three men will be stood under the shade of the (Divine) Throne on the Day of Resurrection: they are a man who likes for his friend whatever he likes for himself, a man who stops doing any thing before he realizes whether it pleases or displeases God, and a man who does not find fault with his friends before he himself gets rid of that fault. A man will find a new fault with himself whenever he gets rid of one. It is quite sufficient for a man to engage with himself.
3. O Ali, it is written in the Torah that four matters always accompany other four ones. He who begins his day with acquisitiveness is beginning his day with discontentment to God. He who complains about misfortune is complaining his Lord. Two thirds of the religion of him who declines before a rich man are gone. The people of this umma who will be in Hell are surely those who deride and disregard the Verses (or signs) of God.
   
   
   Source: here