A nice person on the B30 shuttle paid for a couple's fare because all they had was a $20, they were tourists and couldn't find anyone to make change. They kept trying to get his email address to paypal him the $6 when they returned home (based on their accents they were a LONG way from home) but he said, "No thanks, have a good day."
I think the picture says it better than I can.
Helping a person in need even if its a complete stranger.
Pass it on.
These days, some old habits are fading. Saying "please" and "excuse me," giving up your seat for an old person or a pregnant lady, letting people off the elevator before fighting your way in.

I'm pretty good about these but I read an article that make me think for a little bit. What about the "Thank You's?" Hand-written thank you notes will never go out of style. So, today I am writing a note to self (and you, of course) to do this once again. I wrote a guest speaker a hand-written card and he was admittedly shocked to see it. Wasn't that big of a deal to me but I hear it really made his day.
Make someone's day! Stand out as that person still perfecting the dying art of letter writing (and I guess save the post office by actually purchasing a few stamps). It feels good to be thanked.
Pass it on. :-)