3 things the Prophet “saw” advised to never give up until we die

 Abu Hurayrah (may Allah be pleased with him) said: My close friend (blessings and peace of Allah be upon him) advised me to do three things which I will never give up until I die: to fast three days of every month, to pray Duha, and to pray Witr before going to sleep. Al-Bukhari (1178) and Muslim (721) 
Fasting 3 days each month
He “saw” used to fast the 13th, 14th and 15th of every lunar month. In Arabic, these days are called Al-Ayyam al-Bid, which literally means ‘the white days.
On the authority of ’Abdul-Malik ibn Qudamah ibn Milhan (ra) that his father (ra) said, ’The Messenger of Allah (saw) used to command us to fast the (three) days with the bright nights (al-Ayyam al-Bid), the 13th, 14th and 15th [of every lunar month]’. [Nasa’i]    
 Praying Duha
Wipes sins, and avoids harm!
“Whoever gets used to the Dhuha prayer, his sins will be forgiven even if it is as much as the foam in the ocean.” (HR At-Tirmidhi and Ibn Majah).
“Whoever prays Duha two rak’ahs, then he is not written as a negligent person. Whoever does it as much as four rak’ahs, it is written as a person who is an expert in worship. Whoever does it six cycles will be saved on that day. Whoever does it eight rak’ahs, Allah will write him as an obedient person. And whoever does it twelve cycles, Allah will build a house in Paradise for him.” (HR. At-Thabrani).
Praying Witr
Witr Prayer Is More Valuable compared to the Most Valuable Treasure, it is Is Among the Most Important Sunnah Prayers.
Allah Likes Those That Do the Witr Prayer. The Witr Prayer Is a Completion of the Evening Prayer. Witr Prayer Seen by the Angels.
‘Abdullah bin ‘Umar narrated that the Prophet said “Makes your last prayer at night.”
Aisha narrated that the Prophet used to offer his night prayer while I was sleeping across in his bed. Whenever he intended to offer the Witr prayer, he used to wake me up and I would offer the Witr prayer too.