Ikigai is a Japanese concept that means a reason for being.
In the context of enlightenment, the most important task is maintaining a connection to the higher self. I recommend doing this at least once a day formally during a morning meditation, and informally as often as we remember during the day.
Human existence is intangible. Like ghosts, we show up, haunt the planet for a lifetime and disappear again. All we leave behind are fading memories in those who knew us.