This is a good question; as practitioners of self-realization, we must walk a “razor’s edge.” There are irresponsible teachers who like shortcuts and always remind their followers, “You are already enlightened” and “There is no you” (ouch). The key is to delineate between the absolute and relative reality. Neo-Advaita, or, as they like to say, “non-dual” teachings, with some well-known teachers who make their living parroting the mantra of the absolute reality’s facts while living in the dual waking world. It is like saying that there is no gravity in the ultimate reality; still, you should not try to fly or jump off a tall building.
The common sense approach is the traditional Vedic Advaita, which teaches certain preparations must be made in this dual realm (yoga, devotion, etc.). Of course, in the absolute sense, there is no death, birth, karma, or reincarnation, but those exist in the dream-waking world. You will surely die and very likely reincarnate until you reach a certain level of mind and spiritual maturity that would ready you for self-realization.
So this is the old conflict with neo-advaita and advaita/vedanta. One is ancient; the other is a bastardization of the ancient, tailored to the do-it-quick Western followers.
So the bottom line is you must practice to focus on the absolute daily, but you must realize that you still live in a dream-waking world and must act accordingly. Observe it, follow its rules, but do not identify with it. Try it; it works!