ALWAYS ASK FOR ALLAH FORGIVENESS.

Sunan an-Nasa'i, The Book of Seeking Refuge with Allah
Book 50, Hadith 95
Narrated 'It was narrated from Shaddad bin Aws that:
The Prophet [SAW] said: "The best of prayers for forgiveness is for a person to say: 'Allahumma, anta rabbi, la ilaha illa anta, khalaqtani wa ana 'abduka, wa ana 'ala 'ahdika wa wa'dika mastata'tu, a'udhu bika min sharri ma sana'tu, abuw'u laka bidhanbi, wa abuw'u laka bini'matika 'alayya faghfirli, fa innahu la yaghfirudh-dhunuba illa anta (O Allah, You are my Lord, there is no god but You. You have created me and I am Your slave and I am keeping my promise and covenant to You as much as I can. I seek refuge with You from the evil of what I do. I acknowledge Your blessing and I acknowledge my sin, so forgive me, for there is none who can forgive sin except You.)' If he says this in the morning, believing in it firmly, and dies on that day before evening comes, he will enter Paradise, and if he says it in the evening, believing firmly in it, and dies before morning comes, he will enter Paradise." Al-Walid bin Tha'labah contradicted him. (Sahih)

Sunan an-Nasa'i, The Book of Seeking Refuge with Allah
Book 50, Hadith 96
Narrated 'It was narrated from 'Abdah bin Abi Lubabah that Ibn Yasaf told him that he asked 'Aishah, the wife of the Prophet [SAW],:
What supplication did the Messenger of Allah [SAW] say the most before he died? She said: "The supplication that he said the most was: 'Allahumma, inni a'udhu bika min sharri ma 'amiltu wa min sharri ma lam a'mal ba'd (O Allah, I seek refuge with You from the evil of what I have done, and from the evil of what I have not done yet.)'" (Sahih)

PREPARATION FOR FRIDAY PRAYER

Sunan an-Nasa'i, The Book of Jumu'ah
Book 14, Hadith 1385
Narrated 'It was narrated from Aws bin Aws that:
The Prophet (pbuh) said: "One of the best of your days is Friday. On this day, Adam was created and on this day he died, on this day the Trumpet will be blown, and on this day all creatures will swoon. So send a great deal of salah upon me on this day, for your salah will be presented to me." They said: "O Messenger of Allah (), how will our salah be presented to you when you have decomposed (after death)?" He said: "Allah (SWT), the Mighty and Sublime, has forbidden the earth to consume the bodies of the prophets, peace be upon them." (Da'if)

Sunan an-Nasa'i, The Book of Jumu'ah
Book 14, Hadith 1386
Narrated 'It was narrated (through two chains) from 'Abdur-Rahman bin Abi Sa'eed, from his father, that:
The Messenger of Allah (pbuh) said: "Ghusl and using siwak on Fridays are obligatory for everyone who has reached the age of puberty, and he should put on whatever he can find of perfume." Except that Bukair (one of the narrators in one chain) did not mention 'Abdur-Rahman, and about the perfume he said: "Even if it is women's perfume." (Sahih)

Sunan an-Nasa'i, The Book of Jumu'ah
Book 14, Hadith 1392
Narrated 'It was narrated from Aws bin Aws that:
The Prophet (pbuh) said: "Whoever washes (ghassala) and performs ghusl, comes early to the masjid and sits near the imam, and does not engage in idle talk, he will have for every step he takes (the reward of) a year's worth of good deeds, fasting it and praying Qiyam during it." (Sahih)