I am thinking like this:
I have stuff I want to achieve now, while I'm alive. Raise a family, enjoy my hobbies, write a book, produce smashing music...
If someone now says that I can do all that in my next life, why wouldn't I do it in this life. I sure don't have any memories from a past life, so I wouldn't benefit from dying and postpone all my life goals.
And if you talk about another afterlife, in some kind of heaven or so, I don't think it'd be the same as here. Litterature, video games, music, internet...
So now, I rather live now and make the most out of it, because the only thing that's certain in life is that you die.