Look for and appreciate the greatness in others. Even when (specially) when they are wrong to you.
Anyone can be optimistic when wind is blowing in their direction. It takes a human being with courage and tremendous inner strength to think and be good when wind and people are blowing against them. Just like muscular strength, this strength can also be developed with practice and discipline.
In the end, we all will be sand and dust. What would matter the most in the end is that without allowing yourself to be taken advantage of, how good a person you became and how much of your inner superhero you expressed.