Be Kind Whenever Possible. It Is Always Possible - Dalai Lama
It is always possible to be kind to others because you must understand that you are making a difference in their lives by caring just a little bit about what you can.
Simple things include seeing that someone needs a door opened for them. Just go the "extra mile" and see those simple random acts of kindness that you can be involved in.
You never know if they were having the worse day in their life and that one simple act of kindness could have helped them see that they do in fact matter.
This is always possible so don't let things that you easily are able to contribute towards pass by.
It is foolish if you know that you were able to play a little part in helping their future.