We can encourage others by something as simple as recognizing something they do. Case in point. You see someone taking a class and you notice how much effort they put into doing the exercises the instructor has given them. You say to that person, "wow, you looked fantastic doing that move." You have done so many things for the person that was said to. You increased their confidence, they actually feel as though others are watching them so the next class will be even better for them.
What can you do today to encourage someone else other than yourself?