Allah (swt) has told us in the Quran that this night is better than a thousand nights.
The Night of Qadr is much better than one thousand months. (3) The angels and the Spirit descend in it, with the leave of your Lord, along with every command. 2 (4) Peace it is till the debut of dawn. (5) Surah Qadr
Narrated: Abu Huraira
The Prophet (saw) said, "Whoever established prayers on the night of Qadr out of sincere faith and hoping for a reward from Allah, then all his previous sins will be forgiven; and whoever fasts in the month of Ramadan out of sincere faith, and hoping for a reward from Allah, then all his previous sins will be forgiven." Bukhari 125
You can do lots of nawafil, read Quran, make istighfar, send lots of durood upon our beloved Prophet (saw).
Aisha (RA) stated that I asked Rasool Allah peace be upon him, "If I find Lailatul Qadr then what should I do? He peace be upon him said, recite this Dua."ALLAH HUMMA INNAKA A’FUWUN TOHIB BUL AFWA FA’AFU ANNI" - "O Allah! You are the Forgiver and You like forgiving so forgive me” (Tirmidhi)
Allah's Apostle used to practice Itikaf in the last ten nights of Ramadan and used to say, "Look for the Night of Qadr in the last ten nights of the month of Ramadan." Bukhari 237
Keep reciting that dua and you can read Allahumma salli Ala and Allahumma barik Ala. Always and be sincere without haste make sure you have peace in your heart, and insha-Allah you'll be forgiven, please make dua for me and my family and the rest of the Ummah.
And Allah knows best.