Today is Random Acts of Kindness Day, part of R.A.K. Week that goes through Sunday of this week. The idea is for everyone to do one nice thing for another person and start a tidal wave of kindness that become contagious until people stop being huge jerks to each other.** It's also a great excuse to just be nice for the day.
(**Those may not be their exact words.)
Here are some ideas for your random act of kindness:
give a stranger a compliment
do the dishes for your spouse
let that car merge ahead of you
smile at a stranger
call a friend you know is going through a rough patch
It doesn't take much to make someone feel special and to change the whole course of their day. Try it out, it'll probably put a smile on your face also.