Instead of racing to cut someone off in front of you let them in the lane of traffic. An extra second or two waiting won’t kill you.
Help a senior struggling with a bag of groceries; don’t just stand there watching them struggle, remember that could be you someday trying to carry a heavy bag when you’re really not able to.
Introduce yourself to the new person at work and make them feel welcome. You know how it was on your first day there, and I’ll bet it was anything but comfortable and don’t you wish someone had taken the time to show you the ropes?
A little kindness not only goes a long way but it comes back to you as well.