1. Taking a bath, using fragrance and putting on the best cloth.
2. Cutting nails and shaving mustache
3. Reading Al-Kahfi
It was narrated from Abu Sa’eed al-Khduri that the Prophet (sallAllahu ályhi wasallam) said: “Whoever reads Soorat al-Kahf on Friday, he will be illuminated with light between the two Fridays.”
(Narrated by al-Haakim; classed as saheeh by al-Albaani)
4. Doing Shalawat to the Prophet many times.
According to a hadith by the Prophet (SAW) that was narrated that Fadaalah ibn ‘Ubayd (RA), the Prophet (SAW) said: “ Whilst the Messenger of Allah (SAW) was sitting, a man came in and prayed and said, “O Allah, forgive me and have mercy on me.” The Messenger of Allah (SAW) said, “You have been too hasty, O worshipper. When you have prayed and are sitting, praise Allah as He deserves to be praised, and send blessings upon me , then call upon Him.” [Narrated by Al-Tirmidhi, 3476]
According to another version  of the hadith, the Prophet (SAW) said: “ When one of you prays, let him start with praise of Allah, then let him send blessings upon the Prophet (SAW), then let him ask whatever he likes after that.” Then another man prayed after that, and he praised Allah and sent blessings upon the Prophet (SAW). The Prophet (SAW) said: “O worshipper, ask and you will be answered.” [Classed as Saheeh by Al-Albaani in Saheeh Al-Tirmidhi, 2765, 2767]
The Prophet (SAW) said: “ Every dua is kept back until you send blessings upon the Prophet (SAW).” [Narrated by Al-Tabaraani in Al-Awsat, 1/220; classed as Saheeh by Al-Albaani in Saheeh Al-Jaami’, 4399]
In Sunan al-Tirmidhi (2381) it is narrated that Ubayy (may Allah be pleased with him) said: I said: O Messenger of Allah, I send a great deal of blessings upon you. How much of my du’aa’ should I make for you? He said: “Whatever you wish.” I said: One-quarter? He said: “Whatever you wish, but if you do more it will be better for you.” I said: One half? He said: “Whatever you wish, but if you do more it will be better for you.” I said: Two-thirds? He said: “Whatever you wish, but if you do more it will be better for you.” I said: I will make all my du’aa’ for you. He said: “Then your worries will be taken care of and your sins will be forgiven.” [Classed as hasan by al-Albaani in Saheeh Sunan al-Tirmidhi.]
According to another hadith from ‘Umar ibn Al-Khattaab (RA), the Prophet (SAW) said: “ Dua is suspended between heaven and earth and none of it is taken up until you send blessings upon your Prophet (SAW).” [Ibn Katheer said: Its isnaad is jayyid. It was classed as hasan by Al-Albaani in Saheeh Al-Tirmidhi, 486]
5. Hastening to the Mosque
6. Performing Sunnah prayer when waiting for the priest or Khatib.
7. Performing Sunnah prayer after performing Jumat prayer
Well, that's all I know what to do on Friday. Hopefully this post is useful for you.