It's easy to get in the habit of negative communication. Whether it's complaining about your morning commute or not getting enough praise on your job, you can find yourself complaining about everything.
This negative attitude can transcend into every aspect of your life. Soon, you'll find yourself having a negative disposition.
Practice speaking kind words about yourself and what's around you. The old saying, "If you don't have anything nice to say, don't say it" will definitely come in handy.