Meditation means keeping one mind. You must understand - what is life? What is death? If you keep one mind, there is no life, no death. Then if you die tomorrow, no problem; if you die in five minutes, no problem.
Correct meditation means correctly understanding your situation moment by moment - what are you doing now? Only do it! Then, each action is complete; each action is enough. Then no thinking, so each moment I can perceive everything just like this.