You really should check out George Saunders' wonderful convocation speech found via a sharing friend on Facebook. Here's a taste:

So here’s something I know to be true, although it’s a little corny, and I don’t quite know what to do with it:

What I regret most in my life are failures of kindness. 

Those moments when another human being was there, in front of me, suffering, and I responded…sensibly.  Reservedly.  Mildly.

Or, to look at it from the other end of the telescope:  Who, in your life, do you remember most fondly, with the most undeniable feelings of warmth?

Those who were kindest to you, I bet.

It’s a little facile, maybe, and certainly hard to implement, but I’d say, as a goal in life, you could do worse than: Try to be kinder.

Amen brother.