Just a simple, kind word.  Something easy to find.  It doesn't have to be complicated or hard, just a nice word.

Say it.

When you do, people will remember you.  They will note that you are one of the few that were a blessing to them at their last encounter.

One small kind word will create a giant explosion in the heart of the recipient.  Go ahead, make someone's day.

It's a beautiful day in God's world, be sure to see the good.