There is something to be said about being kind to those around us. Everyone has experienced a time when their friend or loved one has done something that could be perceived as a slight. Then the inevitable response to that perceived slight will be anger or sarcasm. The correct response would be to just let it go or not say anything at all.
This concept is almost cliché. Everyone preaches being kind. Everyone says kindness is the best thing you can possible give to another. But really, it isn't always as easy as it is made out to be. Kindness is a hard thing to continually offer. Especially in the face of all the negativity that we all see every single say. Though it isn't easy, it isn't as hard as it seems. It can all start with just turning one negative comment or thought into one positive one. Continue that trend and eventually you will be the kind person that you want to be and everyone will love you for it.
Everyone says these things, but not everyone puts it into action. It is a hard thing to let go of your anger or to actively avoid making snide or hurtful remarks sometimes, especially if it has become commonplace. All I ask is that, at least for today, take a break. Stop and think about everything you are going to say. If it isn't positive, just don't say it. In all honesty, this is mostly an issue of self discipline. It is always easier to say something critical than to offer praise, but that does not mean it is the best course of action. Being kind of not easy, but it is forever rewarding.