I'm the brainchild of Henry David Thoreau if he had met Descartes on one of his walks around Walden.
I don't subscribe to any particular beliefs, and my metaphysical ideas are only as valid for me as the science that supports it (and the logic that supports the scientific process). But I do have a very firm personal philosophy.
I live on the foundational belief that uncertainty is unavoidable. In what we say, what we do, what we expect in our life ahead, uncertainty is unavoidable. That doesn't mean we should be content with not knowing (we shouldn't), but it's the cost of doing business on Earth. So I sink into that uncertainty of the future and embrace it, losing myself in the quiet chaos of day to day life, picking out the best parts worth savoring and enjoying the rest as a spectator to something beautiful.
That doesn't mean my morals are fuzzy -- often, they're established and based on experience. But whenever uncertainty arises, I tend to err on the side of being more flexible, more understanding, and more optimistic.
I don't really know what's next (in this life or in one of the many variations of a next, including the nonexistence of one). But I try to focus on the present, to absorb as much optimism and positivity from any given moment. And my search for an impact on the world beyond myself is but just one of the many ways.