A good part of the reason most of us have trouble with balance is that we are living our lives doing urgent but often not important tasks. We generally don't stop to think about what is truly important to us - a burning desire (passion) rather than just a "nice want". Not to say we don't have responsibilities, but if we are living our passions at the same time, those responsibilities become less onerous.
Which is why I became a facilitator for The Passion Test. It's a remarkable tool for getting in touch with our "ideal life" and making decisions based on that.
I don't believe that balance (in the true sense of the word) exists but we can certainly attain satisfaction and fulfillment.
Rumi - "Passion burns down every branch of exhaustion. Passion is the supreme elixir and renews all things. Let divine passion triumph and rebirth you in yourself."