This sounds like my 11th grade philosophy class, wonderful memories. Lets see.
Well life is always something on my mind, there is too big of an unknown variable to not wonder about it. Our mere existence should be considering little to nothing, considering the vastness of the universe. Or it could be nature's perfect experiment. We just don't know. We are on one planet of billions in one meager galaxy of trillions in an unknowingly infinite universe. We could be the end all to evolution, or we could be so far down the chain that our future is wholly dependent on where we go from here on out. Life is nothing to laugh about, and when you truly consider the possibilities offered to you, offered to the world, and the little we do as humans, it gets depressing almost to a point of no return, upon which you hold little value for yourself. Thankfully I'm a realist, and while I do consider just how meaningless everything truly is on a universal scale, I go a couple notches down, and let myself soak in the fact that I'm a living breathing sentinel being, one of 7 billion, who hold true dominance on a planet, and hopefully more in the future.
As for death, not much to say there. I always considered it not as the end, but as the middle point, in which our imperfect selves can use to reflect upon the follies of life, and from there on out live our eternal lives as we see fit, based upon of course the restriction that are set in place for whatever the afterlife really is. I do believe there is one, we just cannot and will not know what it is.