How to pray from the sunnah

1- Supererogatory salat causes Allah to love His servant more. It has been revealed in a Qudsi Hadeeth that Allah, the Exalted, says: "A servant of Mine continues to draw near to Me with supererogatory works until I love him. Thus when I love him, I will be his ears which he hears with, his eyes which he sees with, his hands which he holds with and his feet which he walks with. If he asks Me, I shall grant him his request, and if he seeks protection from me, I shall protect him." [ Source: Al-Bukhari.]

2- Supererogatory prayers make up for the deficiencies in the obligatory prayers. The Prophet ﷺ said: "Indeed, the first thing to be judged of mankind's deeds on the Day of Resurrection is his As-Salat. Our Lord (Great and Exalted be He) will say to His angels, although He knows better (than them): 'Look into the Salat of my servant, did he perfect it or was he deficient in it?' If it was perfected, it will be written so. However, if it is deficient in any way, He (Allah) will say: 'Look into his deeds, does he have any supererogatory acts?' If he does, He says: 'Make up my servants' obligatory acts from his supererogatory ones,' and the rest of his deeds are treated similarly." [ Source: Abu Dawud.]

3- Supererogatory Salat is best performed at home

It is better to observe any supererogatory Salat at home than in a mosque, except for those for which praying in congregation is recommended, such as at-Taraweeh in the month of Ramadhan. The Prophet ﷺ said: "Indeed, the best Salat (performed) by a man is that which he observes in his house, except for the obligatory ones." [ Source: Al-Bukhari.]