You can do it tomorrow.

1. Don't drive a car unless you absolutely have to.
2. Don't eat animals. Don't kill any creature or benefit from its killing in any way.
3. Don't have any more kids. Don't approve of abortion.
4. Think about what you're doing, what you buy, where. Live with a conscience.
5. Do what's right, not what's expected of you.
6. Don't believe blindly, love with your heart, look with your eyes and hear with your ears, but think with your brain, not your eyes, ears or heart.