Life has absolutely no meaning, and when I say that I mean that there is no established meaning and no way we are to live specifically.
The only thing we're programmed to do is stay alive and fuck, but we're more advanced than settling for, "well, the meaning to life is to eat some food and make some children".
People grow and do different things, and ultimately, you choose your own meaning.
Whether you choose simply to raise a successful family or if you decide that your calling lies in making a difference elsewhere; life, ultimately, is about being happy.
If you're happy with what you're doing, if you have no regrets about where you've been or where you should have gone, if you love your job, your family, your life-- then you've met your own personal 'meaning' to life.
I think people try to make human life out to seem far more important than it actually is, what with religion and everything.