"Remember, O man, that you are dust, and unto dust you shall return." Every religion and culture has it's way of reminding it's followers that they will one day return to the ground from which they came. Whether you believe in reincarnation, eternal life or that oblivion awaits you, the end still looms for every single one of us. It's a fact, no matter how much hard try to ignore it, no matter how many earthly possessions you try to fill your life with.
You are not your sports car, you are not your mansion, you are not the sum of all your material goods. Yes, I am paraphrasing "Fight Club". No, I'm not advocating nihilism. I'm not suggesting that we all give up modern technology, burn everything we own and retreat to some remote compound or anarchist society. I am asking that common sense prevail. Whether you believe in God, Allah, some other religious system or even nothing at all, stop and realize that all of this will be gone one day. We all get so caught up in chasing money, possessions and having the latest and greatest things that we forget that we're not enjoying life. You don't need to believe in a almighty deity to realize that on a long enough time line, everyone's chance of survival hits 0% and that you cannot take your bank account with you. Unless you are a child, chances are very good that in 100 years, you will not be here.
So what will matter? What are you doing right now that actually gives meaning to your existence? Which is more important, the new car or cell phone you want or time with your children? If your life was a book that would be read by everyone in a college class decades from now, would you be proud of it or would it be shown as an example of a wasted existence spent chasing useless crap? Think about it.