Observe i'tikif in the last ten days of Ramadan; devote one's time to prayer; remember Allah; reflect on one's life; make necessary changes or improvements before end of holy month.

I’tikaf is a spiritual practice that Muslims observe during the last ten days of the holy month of Ramadan. It involves secluding oneself in a mosque or other place for worship and devoting one’s time to prayer, reflection, and remembrance of Allah. This was a practice that was observed by Prophet Muhammad himself, as well as his wives after him. Through this practice, Muslims are able to focus on their relationship with God and draw closer to Him through prayer and contemplation. It is also an opportunity for Muslims to reflect on their lives and make any necessary changes or improvements before the end of the holy month.