Genes and memes these are the themes that thou shall follow to be an immortal fellow.

Don't just concentrate on what you are today, think about you can create that will last beyond yourself.

The world is unfair, that is our oppourtunity.
Every time we do a good deed that is a single drop in a land that needs an ocean of positive change.
Once we create a fairer idea through charity or law we create a stream of good deeds.

If you can leave behind a mechanism that creates good deeds then I say that is a life well spent.